def initialize(self):
Machine.initialize(self)
# initiate the Broker responsible to control the request/release
# initialize the operator pool if any
if (self.operatorPool != "None"):
self.operatorPool.initialize()
self.broker = Broker(self)
activate(self.broker, self.broker.run())
for operator in self.operatorPool.operators:
operator.coreObjectIds.append(self.id)
operator.coreObjects.append(self)
# the time that the machine started/ended its wait for the operator
self.timeWaitForOperatorStarted = 0
self.timeWaitForOperatorEnded = 0
self.totalTimeWaitingForOperator = 0
# the time that the machine started/ended its wait for the operator
self.timeWaitForLoadOperatorStarted = 0
self.timeWaitForLoadOperatorEnded = 0
self.totalTimeWaitingForLoadOperator = 0
# the time that the operator started/ended loading the machine
self.timeLoadStarted = 0
self.timeLoadEnded = 0
self.totalLoadTime = 0
# the time that the operator started/ended setting-up the machine
self.timeSetupStarted = 0
self.timeSetupEnded = 0
self.totalSetupTime = 0
# Current entity load/setup/loadOperatorwait/operatorWait related times
self.operatorWaitTimeCurrentEntity = 0 # holds the time that the machine was waiting for the operator
self.loadOperatorWaitTimeCurrentEntity = 0 # holds the time that the machine waits for operator to load the it
self.loadTimeCurrentEntity = 0 # holds the time to load the current entity
self.setupTimeCurrentEntity = 0 # holds the time to setup the machine before processing the current entity
def initialize(self):
Machine.initialize(self)
# initiate the Broker responsible to control the request/release
# initialize the operator pool if any
if self.operatorPool != "None":
self.operatorPool.initialize()
self.broker = Broker(self)
activate(self.broker, self.broker.run())
for operator in self.operatorPool.operators:
operator.coreObjectIds.append(self.id)
operator.coreObjects.append(self)
# the time that the machine started/ended its wait for the operator
self.timeWaitForOperatorStarted = 0
self.timeWaitForOperatorEnded = 0
self.totalTimeWaitingForOperator = 0
# the time that the machine started/ended its wait for the operator
self.timeWaitForLoadOperatorStarted = 0
self.timeWaitForLoadOperatorEnded = 0
self.totalTimeWaitingForLoadOperator = 0
# the time that the operator started/ended loading the machine
self.timeLoadStarted = 0
self.timeLoadEnded = 0
self.totalLoadTime = 0
# the time that the operator started/ended setting-up the machine
self.timeSetupStarted = 0
self.timeSetupEnded = 0
self.totalSetupTime = 0
# Current entity load/setup/loadOperatorwait/operatorWait related times
self.operatorWaitTimeCurrentEntity = 0 # holds the time that the machine was waiting for the operator
self.loadOperatorWaitTimeCurrentEntity = 0 # holds the time that the machine waits for operator to load the it
self.loadTimeCurrentEntity = 0 # holds the time to load the current entity
self.setupTimeCurrentEntity = 0 # holds the time to setup the machine before processing the current entity
def initialize(self):
MachineJobShop.initialize(self)
self.type="MachineManagedJob"
#create an empty Operator Pool. This will be updated by canAcceptAndIsRequested
id = self.id+'_OP'
name=self.objName+'_operatorPool'
self.operatorPool=OperatorPool(id, name, operatorsList=[])
self.operatorPool.initialize()
self.operatorPool.operators=[]
#create a Broker
self.broker = Broker(self)
activate(self.broker,self.broker.run())
#create a Router
from Globals import G
if len(G.RoutersList)==0:
self.router=Router()
activate(self.router,self.router.run())
G.RoutersList.append(self.router)
# otherwise set the already existing router as the machines Router
else:
self.router=G.RoutersList[0]
# holds the Entity that is to be obtained and will be updated by canAcceptAndIsRequested
self.entityToGet=None
class OperatedMachine(Machine):
# =======================================================================
# initialise the id the capacity, of the resource and the distribution
# =======================================================================
def __init__(
self,
id,
name,
capacity=1,
processingTime=None,
failureDistribution="No",
MTTF=0,
MTTR=0,
availability=0,
repairman="None",
operatorPool="None",
operationType="None",
setupTime=None,
loadTime=None,
):
Machine.__init__(
self,
id,
name,
capacity=capacity,
processingTime=processingTime,
failureDistribution=failureDistribution,
MTTF=MTTF,
MTTR=MTTR,
availability=availability,
repairman=repairman,
operatorPool=operatorPool,
operationType=operationType,
setupTime=setupTime,
loadTime=loadTime,
)
# type of the machine
self.type = "OperatedMachine"
# sets the operator resource of the Machine
# check if the operatorPool is a List or a OperatorPool type Object
# if it is a list then initiate a OperatorPool type object containing
# the list of operators provided
"""
change! if the list is empty create operator pool with empty list
"""
if type(operatorPool) is list: # and len(operatorPool)>0:
id = id + "_OP"
name = self.objName + "_operatorPool"
self.operatorPool = OperatorPool(id, name, operatorsList=operatorPool)
else:
self.operatorPool = operatorPool
# update the operatorPool coreObjects list
if self.operatorPool != "None":
self.operatorPool.coreObjectIds.append(self.id)
self.operatorPool.coreObjects.append(self)
# holds the Operator currently processing the Machine
self.currentOperator = None
# define if load/setup/removal/processing are performed by the operator
self.operationType = operationType
# boolean to check weather the machine is being operated
self.toBeOperated = False
# examine if there are multiple operation types performed by the operator
# there can be Setup/Processing operationType
# or the combination of both (MT-Load-Setup-Processing)
self.multOperationTypeList = []
if self.operationType.startswith("MT"):
OTlist = operationType.split("-")
self.operationType = OTlist.pop(0)
self.multOperationTypeList = OTlist
else:
self.multOperationTypeList.append(self.operationType)
# lists to hold statistics of multiple runs
self.WaitingForOperator = []
self.WaitingForLoadOperator = []
self.Loading = []
self.SettingUp = []
# =======================================================================
# initialize the machine
# =======================================================================
def initialize(self):
Machine.initialize(self)
# initiate the Broker responsible to control the request/release
# initialize the operator pool if any
if self.operatorPool != "None":
self.operatorPool.initialize()
self.broker = Broker(self)
activate(self.broker, self.broker.run())
for operator in self.operatorPool.operators:
operator.coreObjectIds.append(self.id)
operator.coreObjects.append(self)
# the time that the machine started/ended its wait for the operator
self.timeWaitForOperatorStarted = 0
self.timeWaitForOperatorEnded = 0
self.totalTimeWaitingForOperator = 0
# the time that the machine started/ended its wait for the operator
self.timeWaitForLoadOperatorStarted = 0
self.timeWaitForLoadOperatorEnded = 0
self.totalTimeWaitingForLoadOperator = 0
# the time that the operator started/ended loading the machine
self.timeLoadStarted = 0
self.timeLoadEnded = 0
self.totalLoadTime = 0
# the time that the operator started/ended setting-up the machine
self.timeSetupStarted = 0
self.timeSetupEnded = 0
self.totalSetupTime = 0
# Current entity load/setup/loadOperatorwait/operatorWait related times
self.operatorWaitTimeCurrentEntity = 0 # holds the time that the machine was waiting for the operator
self.loadOperatorWaitTimeCurrentEntity = 0 # holds the time that the machine waits for operator to load the it
self.loadTimeCurrentEntity = 0 # holds the time to load the current entity
self.setupTimeCurrentEntity = 0 # holds the time to setup the machine before processing the current entity
# =======================================================================
# the main process of the machine
# =======================================================================
def run(self):
# execute all through simulation time
while 1:
# wait until the machine can accept an entity and one predecessor requests it
# canAcceptAndIsRequested is invoked to check when the machine requested to receive an entity
yield waituntil, self, self.canAcceptAndIsRequested
# here or in the get entity (apart from the loatTimeCurrentEntity)
# in case they are placed inside the getEntity then the initialize of
# the corresponding variables should be moved to the initialize() of the CoreObject
self.operatorWaitTimeCurrentEntity = 0
self.loadOperatorWaitTimeCurrentEntity = 0
self.loadTimeCurrentEntity = 0
self.setupTimeCurrentEntity = 0
# ======= request a resource
if (self.operatorPool != "None") and any(type == "Load" for type in self.multOperationTypeList):
# when it's ready to accept (canAcceptAndIsRequested) then inform the broker
# machines waits to be operated (waits for the operator)
self.requestOperator()
self.timeWaitForLoadOperatorStarted = self.env.now
# wait until the Broker has waited times equal to loadTime (if any)
yield waituntil, self, self.broker.brokerIsSet
self.timeWaitForLoadOperatorEnded = self.env.now
self.loadOperatorWaitTimeCurrentEntity += (
self.timeWaitForLoadOperatorEnded - self.timeWaitForLoadOperatorStarted
)
self.totalTimeWaitingForLoadOperator += self.loadOperatorWaitTimeCurrentEntity
# ======= Load the machine if the Load is defined as one of the Operators' operation types
if any(type == "Load" for type in self.multOperationTypeList) and self.isOperated():
self.timeLoadStarted = self.env.now
yield hold, self, self.calculateLoadTime()
# if self.interrupted(): There is the issue of failure during the Loading
self.timeLoadEnded = self.env.now
self.loadTimeCurrentEntity = self.timeLoadEnded - self.timeLoadStarted
self.totalLoadTime += self.loadTimeCurrentEntity
# ======= release a resource if the only operation type is Load
if (
(self.operatorPool != "None")
and any(type == "Load" for type in self.multOperationTypeList)
and not any(type == "Processing" or type == "Setup" for type in self.multOperationTypeList)
and self.isOperated()
):
# after getting the entity release the operator
# machine has to release the operator
self.releaseOperator()
# wait until the Broker has finished processing
yield waituntil, self, self.broker.brokerIsSet
# get the entity
# if there was loading time then we must solve the problem of getting an entity
# from an unidentified giver or not getting an entity at all as the giver
# may fall in failure mode
self.currentEntity = self.getEntity()
# set the currentEntity as the Entity just received and initialize the timer timeLastEntityEntered
self.nameLastEntityEntered = (
self.currentEntity.name
) # this holds the name of the last entity that got into Machine
self.timeLastEntityEntered = self.env.now # this holds the last time that an entity got into Machine
# variables dedicated to hold the processing times, the time when the Entity entered,
# and the processing time left
timeEntered = self.env.now # timeEntered dummy Timer that holds the time the last Entity Entered
# ======= request a resource if it is not already assigned an Operator
if (
(self.operatorPool != "None")
and any(type == "Processing" or type == "Setup" for type in self.multOperationTypeList)
and not self.isOperated()
):
# when it's ready to accept (canAcceptAndIsRequested) then inform the broker
# machines waits to be operated (waits for the operator)
self.requestOperator()
self.timeWaitForOperatorStarted = self.env.now
# wait until the Broker has waited times equal to loadTime (if any)
yield waituntil, self, self.broker.brokerIsSet
self.timeWaitForOperatorEnded = self.env.now
self.operatorWaitTimeCurrentEntity += self.timeWaitForOperatorEnded - self.timeWaitForOperatorStarted
self.totalProcessingTimeInCurrentEntity = (
self.calculateProcessingTime()
) # get the processing time, tinMStarts holds the processing time of the machine
tinM = self.totalProcessingTimeInCurrentEntity # timer to hold the processing time left
# ======= setup the machine if the Setup is defined as one of the Operators' operation types
# in plantSim the setup is performed when the machine has to process a new type of Entity and only once
if any(type == "Setup" for type in self.multOperationTypeList) and self.isOperated():
self.timeSetupStarted = self.env.now
yield hold, self, self.calculateSetupTime()
# if self.interrupted(): There is the issue of failure during the setup
self.timeSetupEnded = self.env.now
self.setupTimeCurrentEntity = self.timeSetupEnded - self.timeSetupStarted
self.totalSetupTime += self.setupTimeCurrentEntity
# ======= release a resource if the only operation type is Setup
if (
(self.operatorPool != "None")
and self.isOperated()
and any(type == "Setup" or type == "Load" for type in self.multOperationTypeList)
and not any(type == "Processing" for type in self.multOperationTypeList)
):
# after getting the entity release the operator
# machine has to release the operator
self.releaseOperator()
# print self.objName, 'operator released', self.env.now
# wait until the Broker has finished processing
yield waituntil, self, self.broker.brokerIsSet
# variables used to flag any interruptions and the end of the processing
interruption = False
processingEndedFlag = True
# timers to follow up the failure time of the machine while on current Entity
failureTime = 0 # dummy variable keeping track of the failure time
# might be feasible to avoid it
self.downTimeInCurrentEntity = 0 # holds the total time that the
# object was down while holding current entity
# this loop is repeated until the processing time is expired with no failure
# check when the processingEndedFlag switched to false
while processingEndedFlag:
# tBefore : dummy variable to keep track of the time that the processing starts after
# every interruption
tBefore = self.env.now
# wait for the processing time left tinM, if no interruption occurs then change the
# processingEndedFlag and exit loop,
# else (if interrupted()) set interruption flag to true (only if tinM==0),
# and recalculate the processing time left tinM,
# passivate while waiting for repair.
yield hold, self, tinM # getting processed for remaining processing time tinM
if self.interrupted(): # if a failure occurs while processing the machine is interrupted.
# output to trace that the Machine (self.objName) got interrupted
self.outputTrace(self.getActiveObjectQueue()[0].name, "Interrupted at " + self.objName)
# recalculate the processing time left tinM
tinM = tinM - (self.env.now - tBefore)
if (
tinM == 0
): # sometimes the failure may happen exactly at the time that the processing would finish
# this may produce disagreement with the simul8 because in both SimPy and Simul8
# it seems to be random which happens 1st
# this should not appear often to stochastic models though where times are random
interruption = True
# passivate the Machine for as long as there is no repair
# start counting the down time at breatTime dummy variable
breakTime = self.env.now # dummy variable that the interruption happened
# =============== release the operator if there is failure
if (
(self.operatorPool != "None")
and self.isOperated()
and any(type == "Processing" for type in self.multOperationTypeList)
):
self.releaseOperator()
# print self.objName, 'operator released due to failure', self.env.now
yield waituntil, self, self.broker.brokerIsSet
# if there is a failure in the machine it is passivated
yield passivate, self
# use the timers to count the time that Machine is down and related
self.downTimeProcessingCurrentEntity += (
self.env.now - breakTime
) # count the time that Machine is down while processing this Entity
self.downTimeInCurrentEntity += (
self.env.now - breakTime
) # count the time that Machine is down while on currentEntity
self.timeLastFailureEnded = self.env.now # set the timeLastFailureEnded
failureTime += self.env.now - breakTime # dummy variable keeping track of the failure time
# output to trace that the Machine self.objName was passivated for the current failure time
self.outputTrace(
self.getActiveObjectQueue()[0].name,
"passivated in " + self.objName + " for " + str(self.env.now - breakTime),
)
# =============== request a resource after the repair
if (
(self.operatorPool != "None")
and any(type == "Processing" for type in self.multOperationTypeList)
and not interruption
):
self.timeWaitForOperatorStarted = self.env.now
self.requestOperator()
yield waituntil, self, self.broker.brokerIsSet
self.timeWaitForOperatorEnded = self.env.now
self.operatorWaitTimeCurrentEntity += (
self.timeWaitForOperatorEnded - self.timeWaitForOperatorStarted
)
# if no interruption occurred the processing in M1 is ended
else:
processingEndedFlag = False
# output to trace that the processing in the Machine self.objName ended
self.outputTrace(self.getActiveObjectQueue()[0].name, "ended processing in " + self.objName)
# =============== release resource after the end of processing
if (
(self.operatorPool != "None")
and any(type == "Processing" for type in self.multOperationTypeList)
and not interruption
):
self.releaseOperator()
yield waituntil, self, self.broker.brokerIsSet
# set the variable that flags an Entity is ready to be disposed
self.waitToDispose = True
# update the total working time
self.totalWorkingTime += (
self.totalProcessingTimeInCurrentEntity
) # the total processing time for this entity
# is what the distribution initially gave
# update the variables keeping track of Entity related attributes of the machine
self.timeLastEntityEnded = (
self.env.now
) # this holds the time that the last entity ended processing in Machine
self.nameLastEntityEnded = (
self.currentEntity.name
) # this holds the name of the last entity that ended processing in Machine
self.completedJobs += 1 # Machine completed one more Job
# re-initialize the downTimeProcessingCurrentEntity.
# a new machine is about to enter
self.downTimeProcessingCurrentEntity = 0
# dummy variable requests the successor object now
reqTime = self.env.now # entity has ended processing in Machine and requests for the next object
# initialize the timer downTimeInTryingToReleaseCurrentEntity, we have to count how much time
# the Entity will wait for the next successor to be able to accept (canAccept)
self.downTimeInTryingToReleaseCurrentEntity = 0
while 1:
# wait until the next Object is available or machine has failure
yield waituntil, self, self.ifCanDisposeOrHaveFailure
# if Next object available break
if self.Up:
break
# if M1 had failure, we want to wait until it is fixed and also count the failure time.
else:
failTime = self.env.now # dummy variable holding the time failure happened
# passivate until machine is up
yield waituntil, self, self.checkIfMachineIsUp
failureTime += (
self.env.now - failTime
) # count the failure while on current entity time with failureTime variable
# calculate the time the Machine was down while trying to dispose the current Entity,
# and the total down time while on current Entity
self.downTimeInTryingToReleaseCurrentEntity += self.env.now - failTime
self.downTimeInCurrentEntity += (
self.env.now - failTime
) # already updated from failures during processing
# update the timeLastFailureEnded
self.timeLastFailureEnded = self.env.now
# dummy variable holding the total time the Entity spent in the Machine
# count the time the Machine was blocked subtracting the failureTime
# and the processing time from the totalTime spent in the Machine
self.totalTimeInCurrentEntity = self.env.now - timeEntered
# =======================================================================
# checks if the Machine can accept an entity
# it checks also who called it and returns TRUE only to the predecessor
# that will give the entity.
# =======================================================================
def canAccept(self, callerObject=None):
# get active and giver objects
activeObject = self.getActiveObject()
activeObjectQueue = self.getActiveObjectQueue()
giverObject = self.getGiverObject()
# if we have only one predecessor just check if there is a place and the machine is up
# this is done to achieve better (cpu) processing time
# then we can also use it as a filter for a yield method
if len(activeObject.previous) == 1 or callerObject == None:
if activeObject.operatorPool != "None" and any(
type == "Load" for type in activeObject.multOperationTypeList
):
return (
activeObject.operatorPool.checkIfResourceIsAvailable()
and activeObject.Up
and len(activeObjectQueue) < activeObject.capacity
)
else:
return activeObject.Up and len(activeObjectQueue) < activeObject.capacity
thecaller = callerObject
# return True ONLY if the length of the activeOjbectQue is smaller than
# the object capacity, and the callerObject is not None but the giverObject
if activeObject.operatorPool != "None" and any(type == "Load" for type in activeObject.multOperationTypeList):
return (
activeObject.operatorPool.checkIfResourceIsAvailable()
and activeObject.Up
and len(activeObjectQueue) < activeObject.capacity
)
else:
# the operator doesn't have to be present for the loading of the machine as the load operation
# is not assigned to operators
return activeObject.Up and len(activeObjectQueue) < activeObject.capacity
# while if the set up is performed before the (automatic) loading of the machine then the availability of the
# operator is requested
# return (activeObject.operatorPool=='None' or activeObject.operatorPool.checkIfResourceIsAvailable())\
# and activeObject.Up and len(activeObjectQueue)<activeObject.capacity
# =======================================================================
# checks if the Machine can accept an entity and there is an entity in
# some possible giver waiting for it
# also updates the giver to the one that is to be taken
# =======================================================================
def canAcceptAndIsRequested(self):
# get active and giver objects
activeObject = self.getActiveObject()
activeObjectQueue = self.getActiveObjectQueue()
giverObject = self.getGiverObject()
# if we have only one predecessor just check if there is a place,
# the machine is up and the predecessor has an entity to dispose
# if the machine has to compete for an Operator that loads the entities onto it
# check if the predecessor if blocked by an other Machine
# if not then the machine has to block the predecessor giverObject to avoid conflicts
# with other competing machines
if len(activeObject.previous) == 1:
if activeObject.operatorPool != "None" and any(
type == "Load" for type in activeObject.multOperationTypeList
):
if (
activeObject.operatorPool.checkIfResourceIsAvailable()
and activeObject.Up
and len(activeObjectQueue) < activeObject.capacity
and giverObject.haveToDispose(activeObject)
and not giverObject.exitIsAssigned()
):
activeObject.giver.assignExit()
return True
else:
return False
else:
# the operator performs no load and the entity is received by the machine while there is
# no need for operators presence. The operator needs to be present only where the load Type
# operation is assigned
return (
activeObject.Up
and len(activeObjectQueue) < activeObject.capacity
and giverObject.haveToDispose(activeObject)
)
# if the set-up performance needs be first performed before the transfer of the entity to
# the machine then the presence of an operator to setup the machine before the getEntity()
# is requested
# return (activeObject.operatorPool=='None'\
# or activeObject.operatorPool.checkIfResourceIsAvailable())\
# and activeObject.Up and len(activeObjectQueue)<activeObject.capacity\
# and giverObject.haveToDispose()
# dummy variables that help prioritise the objects requesting to give objects to the Machine (activeObject)
isRequested = False # is requested is dummyVariable checking if it is requested to accept an item
maxTimeWaiting = 0 # dummy variable counting the time a predecessor is blocked
# loop through the possible givers to see which have to dispose and which is the one blocked for longer
for object in activeObject.previous:
if object.haveToDispose(activeObject): # and not object.exitIsAssigned()):
isRequested = True # if the possible giver has entities to dispose of
if (
object.downTimeInTryingToReleaseCurrentEntity > 0
): # and the possible giver has been down while trying to give away the Entity
timeWaiting = (
self.env.now - object.timeLastFailureEnded
) # the timeWaiting dummy variable counts the time end of the last failure of the giver object
else:
timeWaiting = (
self.env.now - object.timeLastEntityEnded
) # in any other case, it holds the time since the end of the Entity processing
# if more than one possible givers have to dispose take the part from the one that is blocked longer
if timeWaiting >= maxTimeWaiting:
activeObject.giver = object # set the giver
maxTimeWaiting = timeWaiting
if activeObject.operatorPool != "None" and any(type == "Load" for type in activeObject.multOperationTypeList):
if (
activeObject.operatorPool.checkIfResourceIsAvailable()
and activeObject.Up
and len(activeObjectQueue) < activeObject.capacity
and isRequested
and not activeObject.giver.exitIsAssigned()
):
activeObject.giver.assignExit()
return True
else:
return False
else:
# the operator doesn't have to be present for the loading of the machine as the load operation
# is not assigned to operators
return activeObject.Up and len(activeObjectQueue) < activeObject.capacity and isRequested
# while if the set up is performed before the (automatic) loading of the machine then the availability of the
# operator is requested
# return (activeObject.operatorPool=='None' or activeObject.operatorPool.checkIfResourceIsAvailable())\
# and activeObject.Up and len(activeObjectQueue)<activeObject.capacity and isRequested
# =======================================================================
# calculates the setup time
# =======================================================================
def calculateSetupTime(self):
return self.stpRng.generateNumber()
# =======================================================================
# calculates the Load time
# =======================================================================
def calculateLoadTime(self):
return self.loadRng.generateNumber()
# =======================================================================
# prepare the machine to be operated
# =======================================================================
def requestOperator(self):
self.broker.invokeBroker()
self.toBeOperated = True
# =======================================================================
# prepare the machine to be released
# =======================================================================
def releaseOperator(self):
self.broker.invokeBroker()
self.toBeOperated = False
# =======================================================================
# check if the machine is currently operated by an operator
# =======================================================================
def isOperated(self):
return self.toBeOperated
# =======================================================================
# check if the machine is already set-up
# =======================================================================
def isSetUp(self):
return self.setUp
# =======================================================================
# request that the machine is set-up by an operator
# =======================================================================
def requestSetup(self):
self.setUp = False
# =======================================================================
# actions to be taken after the simulation ends
# =======================================================================
def postProcessing(self, MaxSimtime=None):
if MaxSimtime == None:
from Globals import G
MaxSimtime = G.maxSimTime
activeObject = self.getActiveObject()
activeObjectQueue = self.getActiveObjectQueue()
alreadyAdded = False # a flag that shows if the blockage time has already been added
# checks all the successors. If no one can accept an Entity then the machine might be blocked
mightBeBlocked = True
for nextObject in self.next:
if nextObject.canAccept():
mightBeBlocked = False
# if there is an entity that finished processing in a Machine but did not get to reach
# the following Object till the end of simulation,
# we have to add this blockage to the percentage of blockage in Machine
# we should exclude the failure time in current entity though!
# if (len(self.Res.activeQ)>0) and (len(self.next[0].Res.activeQ)>0) and ((self.nameLastEntityEntered == self.nameLastEntityEnded)):
if (
(len(activeObjectQueue) > 0)
and (mightBeBlocked)
and ((activeObject.nameLastEntityEntered == activeObject.nameLastEntityEnded))
):
# be careful here, might have to reconsider
activeObject.totalBlockageTime += self.env.now - (
activeObject.timeLastEntityEnded + activeObject.downTimeInTryingToReleaseCurrentEntity
)
if activeObject.Up == False:
activeObject.totalBlockageTime -= self.env.now - activeObject.timeLastFailure
alreadyAdded = True
# if Machine is currently processing an entity we should count this working time
if (
(len(activeObject.getActiveObjectQueue()) > 0)
and (not (activeObject.nameLastEntityEnded == activeObject.nameLastEntityEntered))
and (not (activeObject.operationType == "Processing" and (activeObject.currentOperator == None)))
):
# if Machine is down we should add this last failure time to the time that it has been down in current entity
if self.Up == False:
# if(len(activeObjectQueue)>0) and (self.Up==False):
activeObject.downTimeProcessingCurrentEntity += self.env.now - activeObject.timeLastFailure
activeObject.totalWorkingTime += (
self.env.now
- activeObject.timeLastEntityEntered
- activeObject.downTimeProcessingCurrentEntity
- activeObject.operatorWaitTimeCurrentEntity
- activeObject.setupTimeCurrentEntity
)
activeObject.totalTimeWaitingForOperator += activeObject.operatorWaitTimeCurrentEntity
elif (
(len(activeObject.getActiveObjectQueue()) > 0)
and (not (activeObject.nameLastEntityEnded == activeObject.nameLastEntityEntered))
and (activeObject.currentOperator == None)
):
# needs further research as the time of failure while waiting for operator is not counted yet
if self.Up == False:
activeObject.downTimeProcessingCurrentEntity += self.env.now - activeObject.timeLastFailure
activeObject.totalTimeWaitingForOperator += (
self.env.now - activeObject.timeWaitForOperatorStarted - activeObject.downTimeProcessingCurrentEntity
)
# if Machine is down we have to add this failure time to its total failure time
# we also need to add the last blocking time to total blockage time
if activeObject.Up == False:
activeObject.totalFailureTime += self.env.now - activeObject.timeLastFailure
# we add the value only if it hasn't already been added
# if((len(self.next[0].Res.activeQ)>0) and (self.nameLastEntityEnded==self.nameLastEntityEntered) and (not alreadyAdded)):
if (
(mightBeBlocked)
and (activeObject.nameLastEntityEnded == activeObject.nameLastEntityEntered)
and (not alreadyAdded)
):
activeObject.totalBlockageTime += (
(self.env.now - activeObject.timeLastEntityEnded)
- (self.env.now - activeObject.timeLastFailure)
- activeObject.downTimeInTryingToReleaseCurrentEntity
)
# Machine was idle when it was not in any other state
activeObject.totalWaitingTime = (
MaxSimtime - activeObject.totalWorkingTime - activeObject.totalBlockageTime - activeObject.totalFailureTime
)
if (
activeObject.totalBlockageTime < 0 and activeObject.totalBlockageTime > -0.00001
): # to avoid some effects of getting negative cause of rounding precision
self.totalBlockageTime = 0
if (
activeObject.totalWaitingTime < 0 and activeObject.totalWaitingTime > -0.00001
): # to avoid some effects of getting negative cause of rounding precision
self.totalWaitingTime = 0
activeObject.Failure.append(100 * self.totalFailureTime / MaxSimtime)
activeObject.Blockage.append(100 * self.totalBlockageTime / MaxSimtime)
activeObject.Waiting.append(100 * self.totalWaitingTime / MaxSimtime)
activeObject.Working.append(100 * self.totalWorkingTime / MaxSimtime)
activeObject.WaitingForOperator.append(100 * self.totalTimeWaitingForOperator / MaxSimtime)
activeObject.WaitingForLoadOperator.append(100 * self.totalTimeWaitingForLoadOperator / MaxSimtime)
activeObject.Loading.append(100 * self.totalLoadTime / MaxSimtime)
activeObject.SettingUp.append(100 * self.totalSetupTime / MaxSimtime)
def createBroker(self):
#create a Broker
self.broker = Broker(self)
class MachineManagedJob(MachineJobShop):
# =======================================================================
# initialise the MachineManagedJob
# =======================================================================
def initialize(self):
MachineJobShop.initialize(self)
self.type="MachineManagedJob"
# holds the Entity that is to be obtained and will be updated by canAcceptAndIsRequested
self.entityToGet=None
#===========================================================================
# create an operatorPool if needed
#===========================================================================
def createOperatorPool(self,operatorPool):
#create an empty Operator Pool. This will be updated by canAcceptAndIsRequested
id = self.id+'_OP'
name=self.objName+'_operatorPool'
self.operatorPool=OperatorPool(id, name, operatorsList=[])
from Globals import G
G.OperatorPoolsList.append(self.operatorPool)
#===========================================================================
# create broker if needed
#===========================================================================
def createBroker(self):
#create a Broker
self.broker = Broker(self)
#===========================================================================
# create router if needed
#===========================================================================
def createRouter(self):
#create a Router
from Globals import G
if not G.Router:
self.router=RouterManaged()
G.Router=self.router
# otherwise set the already existing router as the machines Router
else:
self.router=G.Router
#===========================================================================
# initialize broker if needed
#===========================================================================
def initializeOperatorPool(self):
self.operatorPool.initialize()
self.operatorPool.operators=[]
#===========================================================================
# initialize broker if needed
#===========================================================================
def initializeBroker(self):
self.broker.initialize()
self.env.process(self.broker.run())
#===========================================================================
# initialize router if needed
#===========================================================================
def initializeRouter(self):
if not self.router.isInitialized:
self.router.initialize()
if not self.router.isActivated:
self.env.process(self.router.run())
self.router.isActivated=True
# =======================================================================
# checks if the Queue can accept an entity
# TODO: cannot check here if the station in the route of the entity that will be received (if any)
# as the giver (QueueManagedJob) will be sorted from giver.haveToDispose in self.canAcceptAndIsRequested method
# =======================================================================
def canAccept(self, callerObject=None):
activeObject=self.getActiveObject()
activeObjectQueue=activeObject.getActiveObjectQueue()
#return according to the state of the Queue
return len(activeObjectQueue)<activeObject.capacity\
and activeObject.checkIfMachineIsUp()\
and not activeObject.entryIsAssignedTo()
# =======================================================================
# checks if the Queue can accept an specific Entity
# it checks also the next station of the Entity
# and returns true only if the active object is the next station
# =======================================================================
def canAcceptEntity(self, callerEntity=None):
activeObject=self.getActiveObject()
activeObjectQueue=activeObject.getActiveObjectQueue()
thecallerentity=callerEntity
if (thecallerentity!=None):
# if the machine's Id is in the list of the entity's next stations
if activeObject.id in thecallerentity.remainingRoute[0].get('stationIdsList',[]):
#return according to the state of the Queue
return len(activeObjectQueue)<activeObject.capacity\
and activeObject.checkIfMachineIsUp()
return False
# =======================================================================
# checks if the Machine can accept an entity and there is an entity in
# some possible giver waiting for it
# also updates the giver to the one that is to be taken
# =======================================================================
def canAcceptAndIsRequested(self,callerObject=None):
# get active and giver objects
activeObject=self.getActiveObject()
activeObjectQueue=self.getActiveObjectQueue()
# giverObject=activeObject.getGiverObject()
giverObject=callerObject
assert giverObject, 'there must be a caller for canAcceptAndIsRequested'
giverObjectQueue=giverObject.getActiveObjectQueue()
# if the multOperationTypeList of the machine contains Load or Setup
if (activeObject.operatorPool!='None' and (any(type=='Load' for type in activeObject.multOperationTypeList)\
or any(type=='Setup' for type in activeObject.multOperationTypeList))):
if giverObject.haveToDispose(activeObject):
if activeObject.checkIfActive() and len(activeObjectQueue)<activeObject.capacity\
and activeObject.checkOperator(giverObject):
if not giverObject.exitIsAssignedTo():
giverObject.assignExitTo(activeObject)
elif giverObject.exitIsAssignedTo()!=activeObject:
return False
# update entityToGet
activeObject.entityToGet=giverObjectQueue[0]
#make the operators List so that it holds only the manager of the current order
activeObject.operatorPool.operators=[giverObjectQueue[0].manager]
# read the load time of the machine
activeObject.readLoadTime(giverObject)
return True
else:
return False
# if the multOperationTypeList contains only Processing
elif (activeObject.operatorPool!='None' and any(type=='Processing' for type in activeObject.multOperationTypeList)):
if giverObject.haveToDispose(activeObject):
# the operator must not be available for the object to receive the entity
# the exit of the giver should not be assigned
# the manager must not be available for the entity to be delivered
# the operator to the machine while he is not needed for receiving the entity
if activeObject.checkIfActive() and len(activeObjectQueue)<activeObject.capacity:
# the entityToGet should be updated
activeObject.entityToGet=giverObjectQueue[0]
#make the operators List so that it holds only the manager of the current order
activeObject.operatorPool.operators=[giverObjectQueue[0].manager]
# read the load time of the machine
activeObject.readLoadTime(giverObject)
return True
else:
return False
else:
# the operator doesn't have to be present for the loading of the machine as the load operation
# is not assigned to operators
if activeObject.checkIfActive() and len(activeObjectQueue)<activeObject.capacity and giverObject.haveToDispose(activeObject):
# update entityToGet
activeObject.entityToGet=giverObject.getActiveObjectQueue()[0]
activeObject.readLoadTime(giverObject)
return activeObject.checkIfActive() and len(activeObjectQueue)<activeObject.capacity and giverObject.haveToDispose(activeObject)
# =======================================================================
# to be called by canAcceptAndIsRequested and check for the operator
# =======================================================================
def checkOperator(self,callerObject=None): #, candidateEntity=None):
assert callerObject!=None, 'checkOperator must have a caller for MachineManagedJob'
activeObject=self.getActiveObject()
# giverObject=activeObject.getGiverObject()
giverObject=callerObject
giverObjectQueue=giverObject.getActiveObjectQueue()
if giverObjectQueue[0].manager:
manager=giverObjectQueue[0].manager
# TODO: consider using a caller in this case
return manager.checkIfResourceIsAvailable(activeObject)
else:
return True
# if candidateEntity:
# if candidateEntity.manager:
# manager=candidateEntity.manager
# return manager.checkIfResourceIsAvailable()
# else:
# return True
# return False
# =======================================================================
# identifies the Entity to be obtained so that
# getEntity gives it to removeEntity as argument
# =======================================================================
def identifyEntityToGet(self):
# ToDecide
# maybe we should work this way in all CoreObjects???
return self.entityToGet
class OperatedMachine(Machine):
# =======================================================================
# initialise the id the capacity, of the resource and the distribution
# =======================================================================
def __init__(self, id, name, capacity=1, processingTime=None,
failureDistribution='No', MTTF=0, MTTR=0, availability=0, repairman='None',\
operatorPool='None',operationType='None',
setupTime=None, loadTime=None):
Machine.__init__(
self,
id,
name,
capacity=capacity,
processingTime=processingTime,
failureDistribution=failureDistribution,
MTTF=MTTF,
MTTR=MTTR,
availability=availability,
repairman=repairman,
operatorPool=operatorPool,
operationType=operationType,
setupTime=setupTime,
loadTime=loadTime,
)
# type of the machine
self.type = "OperatedMachine"
# sets the operator resource of the Machine
# check if the operatorPool is a List or a OperatorPool type Object
# if it is a list then initiate a OperatorPool type object containing
# the list of operators provided
'''
change! if the list is empty create operator pool with empty list
'''
if (type(operatorPool) is list): #and len(operatorPool)>0:
id = id + '_OP'
name = self.objName + '_operatorPool'
self.operatorPool = OperatorPool(id,
name,
operatorsList=operatorPool)
else:
self.operatorPool = operatorPool
# update the operatorPool coreObjects list
if self.operatorPool != 'None':
self.operatorPool.coreObjectIds.append(self.id)
self.operatorPool.coreObjects.append(self)
# holds the Operator currently processing the Machine
self.currentOperator = None
# define if load/setup/removal/processing are performed by the operator
self.operationType = operationType
# boolean to check weather the machine is being operated
self.toBeOperated = False
# examine if there are multiple operation types performed by the operator
# there can be Setup/Processing operationType
# or the combination of both (MT-Load-Setup-Processing)
self.multOperationTypeList = []
if self.operationType.startswith("MT"):
OTlist = operationType.split('-')
self.operationType = OTlist.pop(0)
self.multOperationTypeList = OTlist
else:
self.multOperationTypeList.append(self.operationType)
# lists to hold statistics of multiple runs
self.WaitingForOperator = []
self.WaitingForLoadOperator = []
self.Loading = []
self.SettingUp = []
# =======================================================================
# initialize the machine
# =======================================================================
def initialize(self):
Machine.initialize(self)
# initiate the Broker responsible to control the request/release
# initialize the operator pool if any
if (self.operatorPool != "None"):
self.operatorPool.initialize()
self.broker = Broker(self)
activate(self.broker, self.broker.run())
for operator in self.operatorPool.operators:
operator.coreObjectIds.append(self.id)
operator.coreObjects.append(self)
# the time that the machine started/ended its wait for the operator
self.timeWaitForOperatorStarted = 0
self.timeWaitForOperatorEnded = 0
self.totalTimeWaitingForOperator = 0
# the time that the machine started/ended its wait for the operator
self.timeWaitForLoadOperatorStarted = 0
self.timeWaitForLoadOperatorEnded = 0
self.totalTimeWaitingForLoadOperator = 0
# the time that the operator started/ended loading the machine
self.timeLoadStarted = 0
self.timeLoadEnded = 0
self.totalLoadTime = 0
# the time that the operator started/ended setting-up the machine
self.timeSetupStarted = 0
self.timeSetupEnded = 0
self.totalSetupTime = 0
# Current entity load/setup/loadOperatorwait/operatorWait related times
self.operatorWaitTimeCurrentEntity = 0 # holds the time that the machine was waiting for the operator
self.loadOperatorWaitTimeCurrentEntity = 0 # holds the time that the machine waits for operator to load the it
self.loadTimeCurrentEntity = 0 # holds the time to load the current entity
self.setupTimeCurrentEntity = 0 # holds the time to setup the machine before processing the current entity
# =======================================================================
# the main process of the machine
# =======================================================================
def run(self):
# execute all through simulation time
while 1:
# wait until the machine can accept an entity and one predecessor requests it
# canAcceptAndIsRequested is invoked to check when the machine requested to receive an entity
yield waituntil, self, self.canAcceptAndIsRequested
# here or in the get entity (apart from the loatTimeCurrentEntity)
# in case they are placed inside the getEntity then the initialize of
# the corresponding variables should be moved to the initialize() of the CoreObject
self.operatorWaitTimeCurrentEntity = 0
self.loadOperatorWaitTimeCurrentEntity = 0
self.loadTimeCurrentEntity = 0
self.setupTimeCurrentEntity = 0
# ======= request a resource
if (self.operatorPool != "None") and any(
type == 'Load' for type in self.multOperationTypeList):
# when it's ready to accept (canAcceptAndIsRequested) then inform the broker
# machines waits to be operated (waits for the operator)
self.requestOperator()
self.timeWaitForLoadOperatorStarted = self.env.now
# wait until the Broker has waited times equal to loadTime (if any)
yield waituntil, self, self.broker.brokerIsSet
self.timeWaitForLoadOperatorEnded = self.env.now
self.loadOperatorWaitTimeCurrentEntity += self.timeWaitForLoadOperatorEnded - self.timeWaitForLoadOperatorStarted
self.totalTimeWaitingForLoadOperator += self.loadOperatorWaitTimeCurrentEntity
# ======= Load the machine if the Load is defined as one of the Operators' operation types
if any(type == "Load" for type in
self.multOperationTypeList) and self.isOperated():
self.timeLoadStarted = self.env.now
yield hold, self, self.calculateLoadTime()
# if self.interrupted(): There is the issue of failure during the Loading
self.timeLoadEnded = self.env.now
self.loadTimeCurrentEntity = self.timeLoadEnded - self.timeLoadStarted
self.totalLoadTime += self.loadTimeCurrentEntity
# ======= release a resource if the only operation type is Load
if (self.operatorPool!="None")\
and any(type=="Load" for type in self.multOperationTypeList)\
and not any(type=="Processing" or type=="Setup" for type in self.multOperationTypeList)\
and self.isOperated():
# after getting the entity release the operator
# machine has to release the operator
self.releaseOperator()
# wait until the Broker has finished processing
yield waituntil, self, self.broker.brokerIsSet
# get the entity
# if there was loading time then we must solve the problem of getting an entity
# from an unidentified giver or not getting an entity at all as the giver
# may fall in failure mode
self.currentEntity = self.getEntity()
# set the currentEntity as the Entity just received and initialize the timer timeLastEntityEntered
self.nameLastEntityEntered = self.currentEntity.name # this holds the name of the last entity that got into Machine
self.timeLastEntityEntered = self.env.now #this holds the last time that an entity got into Machine
# variables dedicated to hold the processing times, the time when the Entity entered,
# and the processing time left
timeEntered = self.env.now # timeEntered dummy Timer that holds the time the last Entity Entered
# ======= request a resource if it is not already assigned an Operator
if(self.operatorPool!="None")\
and any(type=="Processing" or type=="Setup" for type in self.multOperationTypeList)\
and not self.isOperated():
# when it's ready to accept (canAcceptAndIsRequested) then inform the broker
# machines waits to be operated (waits for the operator)
self.requestOperator()
self.timeWaitForOperatorStarted = self.env.now
# wait until the Broker has waited times equal to loadTime (if any)
yield waituntil, self, self.broker.brokerIsSet
self.timeWaitForOperatorEnded = self.env.now
self.operatorWaitTimeCurrentEntity += self.timeWaitForOperatorEnded - self.timeWaitForOperatorStarted
self.totalProcessingTimeInCurrentEntity = self.calculateProcessingTime(
) # get the processing time, tinMStarts holds the processing time of the machine
tinM = self.totalProcessingTimeInCurrentEntity # timer to hold the processing time left
# ======= setup the machine if the Setup is defined as one of the Operators' operation types
# in plantSim the setup is performed when the machine has to process a new type of Entity and only once
if any(type == "Setup" for type in
self.multOperationTypeList) and self.isOperated():
self.timeSetupStarted = self.env.now
yield hold, self, self.calculateSetupTime()
# if self.interrupted(): There is the issue of failure during the setup
self.timeSetupEnded = self.env.now
self.setupTimeCurrentEntity = self.timeSetupEnded - self.timeSetupStarted
self.totalSetupTime += self.setupTimeCurrentEntity
# ======= release a resource if the only operation type is Setup
if (self.operatorPool!="None")\
and self.isOperated()\
and any(type=="Setup" or type=="Load" for type in self.multOperationTypeList)\
and not any(type=="Processing" for type in self.multOperationTypeList):
# after getting the entity release the operator
# machine has to release the operator
self.releaseOperator()
# print self.objName, 'operator released', self.env.now
# wait until the Broker has finished processing
yield waituntil, self, self.broker.brokerIsSet
# variables used to flag any interruptions and the end of the processing
interruption = False
processingEndedFlag = True
# timers to follow up the failure time of the machine while on current Entity
failureTime = 0 # dummy variable keeping track of the failure time
# might be feasible to avoid it
self.downTimeInCurrentEntity = 0 #holds the total time that the
#object was down while holding current entity
# this loop is repeated until the processing time is expired with no failure
# check when the processingEndedFlag switched to false
while processingEndedFlag:
# tBefore : dummy variable to keep track of the time that the processing starts after
# every interruption
tBefore = self.env.now
# wait for the processing time left tinM, if no interruption occurs then change the
# processingEndedFlag and exit loop,
# else (if interrupted()) set interruption flag to true (only if tinM==0),
# and recalculate the processing time left tinM,
# passivate while waiting for repair.
yield hold, self, tinM # getting processed for remaining processing time tinM
if self.interrupted(
): # if a failure occurs while processing the machine is interrupted.
# output to trace that the Machine (self.objName) got interrupted
self.outputTrace(self.getActiveObjectQueue()[0].name,
"Interrupted at " + self.objName)
# recalculate the processing time left tinM
tinM = tinM - (self.env.now - tBefore)
if (
tinM == 0
): # sometimes the failure may happen exactly at the time that the processing would finish
# this may produce disagreement with the simul8 because in both SimPy and Simul8
# it seems to be random which happens 1st
# this should not appear often to stochastic models though where times are random
interruption = True
# passivate the Machine for as long as there is no repair
# start counting the down time at breatTime dummy variable
breakTime = self.env.now # dummy variable that the interruption happened
# =============== release the operator if there is failure
if (self.operatorPool!="None")\
and self.isOperated()\
and any(type=="Processing" for type in self.multOperationTypeList):
self.releaseOperator()
# print self.objName, 'operator released due to failure', self.env.now
yield waituntil, self, self.broker.brokerIsSet
# if there is a failure in the machine it is passivated
yield passivate, self
# use the timers to count the time that Machine is down and related
self.downTimeProcessingCurrentEntity += self.env.now - breakTime # count the time that Machine is down while processing this Entity
self.downTimeInCurrentEntity += self.env.now - breakTime # count the time that Machine is down while on currentEntity
self.timeLastFailureEnded = self.env.now # set the timeLastFailureEnded
failureTime += self.env.now - breakTime # dummy variable keeping track of the failure time
# output to trace that the Machine self.objName was passivated for the current failure time
self.outputTrace(
self.getActiveObjectQueue()[0].name, "passivated in " +
self.objName + " for " + str(self.env.now - breakTime))
# =============== request a resource after the repair
if (self.operatorPool!="None")\
and any(type=="Processing" for type in self.multOperationTypeList)\
and not interruption:
self.timeWaitForOperatorStarted = self.env.now
self.requestOperator()
yield waituntil, self, self.broker.brokerIsSet
self.timeWaitForOperatorEnded = self.env.now
self.operatorWaitTimeCurrentEntity += self.timeWaitForOperatorEnded - self.timeWaitForOperatorStarted
# if no interruption occurred the processing in M1 is ended
else:
processingEndedFlag = False
# output to trace that the processing in the Machine self.objName ended
self.outputTrace(self.getActiveObjectQueue()[0].name,
"ended processing in " + self.objName)
# =============== release resource after the end of processing
if (self.operatorPool!='None')\
and any(type=="Processing" for type in self.multOperationTypeList)\
and not interruption:
self.releaseOperator()
yield waituntil, self, self.broker.brokerIsSet
# set the variable that flags an Entity is ready to be disposed
self.waitToDispose = True
# update the total working time
self.totalWorkingTime += self.totalProcessingTimeInCurrentEntity # the total processing time for this entity
# is what the distribution initially gave
# update the variables keeping track of Entity related attributes of the machine
self.timeLastEntityEnded = self.env.now # this holds the time that the last entity ended processing in Machine
self.nameLastEntityEnded = self.currentEntity.name # this holds the name of the last entity that ended processing in Machine
self.completedJobs += 1 # Machine completed one more Job
# re-initialize the downTimeProcessingCurrentEntity.
# a new machine is about to enter
self.downTimeProcessingCurrentEntity = 0
# dummy variable requests the successor object now
reqTime = self.env.now # entity has ended processing in Machine and requests for the next object
# initialize the timer downTimeInTryingToReleaseCurrentEntity, we have to count how much time
# the Entity will wait for the next successor to be able to accept (canAccept)
self.downTimeInTryingToReleaseCurrentEntity = 0
while 1:
# wait until the next Object is available or machine has failure
yield waituntil, self, self.ifCanDisposeOrHaveFailure
# if Next object available break
if self.Up:
break
# if M1 had failure, we want to wait until it is fixed and also count the failure time.
else:
failTime = self.env.now # dummy variable holding the time failure happened
# passivate until machine is up
yield waituntil, self, self.checkIfMachineIsUp
failureTime += self.env.now - failTime # count the failure while on current entity time with failureTime variable
# calculate the time the Machine was down while trying to dispose the current Entity,
# and the total down time while on current Entity
self.downTimeInTryingToReleaseCurrentEntity += self.env.now - failTime
self.downTimeInCurrentEntity += self.env.now - failTime # already updated from failures during processing
# update the timeLastFailureEnded
self.timeLastFailureEnded = self.env.now
# dummy variable holding the total time the Entity spent in the Machine
# count the time the Machine was blocked subtracting the failureTime
# and the processing time from the totalTime spent in the Machine
self.totalTimeInCurrentEntity = self.env.now - timeEntered
# =======================================================================
# checks if the Machine can accept an entity
# it checks also who called it and returns TRUE only to the predecessor
# that will give the entity.
# =======================================================================
def canAccept(self, callerObject=None):
# get active and giver objects
activeObject = self.getActiveObject()
activeObjectQueue = self.getActiveObjectQueue()
giverObject = self.getGiverObject()
# if we have only one predecessor just check if there is a place and the machine is up
# this is done to achieve better (cpu) processing time
# then we can also use it as a filter for a yield method
if (len(activeObject.previous) == 1 or callerObject == None):
if (activeObject.operatorPool != 'None'
and any(type == 'Load'
for type in activeObject.multOperationTypeList)):
return activeObject.operatorPool.checkIfResourceIsAvailable()\
and activeObject.Up\
and len(activeObjectQueue)<activeObject.capacity
else:
return activeObject.Up and len(activeObjectQueue)<activeObject.capacity\
thecaller = callerObject
# return True ONLY if the length of the activeOjbectQue is smaller than
# the object capacity, and the callerObject is not None but the giverObject
if (activeObject.operatorPool != 'None'
and any(type == 'Load'
for type in activeObject.multOperationTypeList)):
return activeObject.operatorPool.checkIfResourceIsAvailable()\
and activeObject.Up\
and len(activeObjectQueue)<activeObject.capacity
else:
# the operator doesn't have to be present for the loading of the machine as the load operation
# is not assigned to operators
return activeObject.Up and len(
activeObjectQueue) < activeObject.capacity
# while if the set up is performed before the (automatic) loading of the machine then the availability of the
# operator is requested
# return (activeObject.operatorPool=='None' or activeObject.operatorPool.checkIfResourceIsAvailable())\
# and activeObject.Up and len(activeObjectQueue)<activeObject.capacity
# =======================================================================
# checks if the Machine can accept an entity and there is an entity in
# some possible giver waiting for it
# also updates the giver to the one that is to be taken
# =======================================================================
def canAcceptAndIsRequested(self):
# get active and giver objects
activeObject = self.getActiveObject()
activeObjectQueue = self.getActiveObjectQueue()
giverObject = self.getGiverObject()
# if we have only one predecessor just check if there is a place,
# the machine is up and the predecessor has an entity to dispose
# if the machine has to compete for an Operator that loads the entities onto it
# check if the predecessor if blocked by an other Machine
# if not then the machine has to block the predecessor giverObject to avoid conflicts
# with other competing machines
if (len(activeObject.previous) == 1):
if (activeObject.operatorPool != 'None'
and any(type == 'Load'
for type in activeObject.multOperationTypeList)):
if activeObject.operatorPool.checkIfResourceIsAvailable()\
and activeObject.Up and len(activeObjectQueue)<activeObject.capacity\
and giverObject.haveToDispose(activeObject) and not giverObject.exitIsAssigned():
activeObject.giver.assignExit()
return True
else:
return False
else:
# the operator performs no load and the entity is received by the machine while there is
# no need for operators presence. The operator needs to be present only where the load Type
# operation is assigned
return activeObject.Up and len(activeObjectQueue)<activeObject.capacity\
and giverObject.haveToDispose(activeObject)
# if the set-up performance needs be first performed before the transfer of the entity to
# the machine then the presence of an operator to setup the machine before the getEntity()
# is requested
# return (activeObject.operatorPool=='None'\
# or activeObject.operatorPool.checkIfResourceIsAvailable())\
# and activeObject.Up and len(activeObjectQueue)<activeObject.capacity\
# and giverObject.haveToDispose()
# dummy variables that help prioritise the objects requesting to give objects to the Machine (activeObject)
isRequested = False # is requested is dummyVariable checking if it is requested to accept an item
maxTimeWaiting = 0 # dummy variable counting the time a predecessor is blocked
# loop through the possible givers to see which have to dispose and which is the one blocked for longer
for object in activeObject.previous:
if (object.haveToDispose(activeObject)
): # and not object.exitIsAssigned()):
isRequested = True # if the possible giver has entities to dispose of
if (
object.downTimeInTryingToReleaseCurrentEntity > 0
): # and the possible giver has been down while trying to give away the Entity
timeWaiting = self.env.now - object.timeLastFailureEnded # the timeWaiting dummy variable counts the time end of the last failure of the giver object
else:
timeWaiting = self.env.now - object.timeLastEntityEnded # in any other case, it holds the time since the end of the Entity processing
#if more than one possible givers have to dispose take the part from the one that is blocked longer
if (timeWaiting >= maxTimeWaiting):
activeObject.giver = object # set the giver
maxTimeWaiting = timeWaiting
if (activeObject.operatorPool != 'None'
and any(type == 'Load'
for type in activeObject.multOperationTypeList)):
if activeObject.operatorPool.checkIfResourceIsAvailable()\
and activeObject.Up and len(activeObjectQueue)<activeObject.capacity\
and isRequested and not activeObject.giver.exitIsAssigned():
activeObject.giver.assignExit()
return True
else:
return False
else:
# the operator doesn't have to be present for the loading of the machine as the load operation
# is not assigned to operators
return activeObject.Up and len(
activeObjectQueue) < activeObject.capacity and isRequested
# while if the set up is performed before the (automatic) loading of the machine then the availability of the
# operator is requested
# return (activeObject.operatorPool=='None' or activeObject.operatorPool.checkIfResourceIsAvailable())\
# and activeObject.Up and len(activeObjectQueue)<activeObject.capacity and isRequested
# =======================================================================
# calculates the setup time
# =======================================================================
def calculateSetupTime(self):
return self.stpRng.generateNumber()
# =======================================================================
# calculates the Load time
# =======================================================================
def calculateLoadTime(self):
return self.loadRng.generateNumber()
# =======================================================================
# prepare the machine to be operated
# =======================================================================
def requestOperator(self):
self.broker.invokeBroker()
self.toBeOperated = True
# =======================================================================
# prepare the machine to be released
# =======================================================================
def releaseOperator(self):
self.broker.invokeBroker()
self.toBeOperated = False
# =======================================================================
# check if the machine is currently operated by an operator
# =======================================================================
def isOperated(self):
return self.toBeOperated
# =======================================================================
# check if the machine is already set-up
# =======================================================================
def isSetUp(self):
return self.setUp
# =======================================================================
# request that the machine is set-up by an operator
# =======================================================================
def requestSetup(self):
self.setUp = False
# =======================================================================
# actions to be taken after the simulation ends
# =======================================================================
def postProcessing(self, MaxSimtime=None):
if MaxSimtime == None:
from Globals import G
MaxSimtime = G.maxSimTime
activeObject = self.getActiveObject()
activeObjectQueue = self.getActiveObjectQueue()
alreadyAdded = False # a flag that shows if the blockage time has already been added
# checks all the successors. If no one can accept an Entity then the machine might be blocked
mightBeBlocked = True
for nextObject in self.next:
if nextObject.canAccept():
mightBeBlocked = False
# if there is an entity that finished processing in a Machine but did not get to reach
# the following Object till the end of simulation,
# we have to add this blockage to the percentage of blockage in Machine
# we should exclude the failure time in current entity though!
# if (len(self.Res.activeQ)>0) and (len(self.next[0].Res.activeQ)>0) and ((self.nameLastEntityEntered == self.nameLastEntityEnded)):
if (len(activeObjectQueue)>0) and (mightBeBlocked)\
and ((activeObject.nameLastEntityEntered == activeObject.nameLastEntityEnded)):
# be careful here, might have to reconsider
activeObject.totalBlockageTime += self.env.now - (
activeObject.timeLastEntityEnded +
activeObject.downTimeInTryingToReleaseCurrentEntity)
if activeObject.Up == False:
activeObject.totalBlockageTime -= self.env.now - activeObject.timeLastFailure
alreadyAdded = True
#if Machine is currently processing an entity we should count this working time
if(len(activeObject.getActiveObjectQueue())>0)\
and (not (activeObject.nameLastEntityEnded==activeObject.nameLastEntityEntered))\
and (not (activeObject.operationType=='Processing' and (activeObject.currentOperator==None))):
#if Machine is down we should add this last failure time to the time that it has been down in current entity
if self.Up == False:
# if(len(activeObjectQueue)>0) and (self.Up==False):
activeObject.downTimeProcessingCurrentEntity += self.env.now - activeObject.timeLastFailure
activeObject.totalWorkingTime+=self.env.now-activeObject.timeLastEntityEntered\
-activeObject.downTimeProcessingCurrentEntity\
-activeObject.operatorWaitTimeCurrentEntity\
-activeObject.setupTimeCurrentEntity
activeObject.totalTimeWaitingForOperator += activeObject.operatorWaitTimeCurrentEntity
elif(len(activeObject.getActiveObjectQueue())>0)\
and (not (activeObject.nameLastEntityEnded==activeObject.nameLastEntityEntered))\
and (activeObject.currentOperator==None):
# needs further research as the time of failure while waiting for operator is not counted yet
if self.Up == False:
activeObject.downTimeProcessingCurrentEntity += self.env.now - activeObject.timeLastFailure
activeObject.totalTimeWaitingForOperator+=self.env.now-activeObject.timeWaitForOperatorStarted\
-activeObject.downTimeProcessingCurrentEntity
# if Machine is down we have to add this failure time to its total failure time
# we also need to add the last blocking time to total blockage time
if (activeObject.Up == False):
activeObject.totalFailureTime += self.env.now - activeObject.timeLastFailure
# we add the value only if it hasn't already been added
#if((len(self.next[0].Res.activeQ)>0) and (self.nameLastEntityEnded==self.nameLastEntityEntered) and (not alreadyAdded)):
if ((mightBeBlocked) and (activeObject.nameLastEntityEnded
== activeObject.nameLastEntityEntered)
and (not alreadyAdded)):
activeObject.totalBlockageTime += (
self.env.now - activeObject.timeLastEntityEnded) - (
self.env.now - activeObject.timeLastFailure
) - activeObject.downTimeInTryingToReleaseCurrentEntity
#Machine was idle when it was not in any other state
activeObject.totalWaitingTime = MaxSimtime - activeObject.totalWorkingTime - activeObject.totalBlockageTime - activeObject.totalFailureTime
if activeObject.totalBlockageTime < 0 and activeObject.totalBlockageTime > -0.00001: #to avoid some effects of getting negative cause of rounding precision
self.totalBlockageTime = 0
if activeObject.totalWaitingTime < 0 and activeObject.totalWaitingTime > -0.00001: #to avoid some effects of getting negative cause of rounding precision
self.totalWaitingTime = 0
activeObject.Failure.append(100 * self.totalFailureTime / MaxSimtime)
activeObject.Blockage.append(100 * self.totalBlockageTime / MaxSimtime)
activeObject.Waiting.append(100 * self.totalWaitingTime / MaxSimtime)
activeObject.Working.append(100 * self.totalWorkingTime / MaxSimtime)
activeObject.WaitingForOperator.append(
100 * self.totalTimeWaitingForOperator / MaxSimtime)
activeObject.WaitingForLoadOperator.append(
100 * self.totalTimeWaitingForLoadOperator / MaxSimtime)
activeObject.Loading.append(100 * self.totalLoadTime / MaxSimtime)
activeObject.SettingUp.append(100 * self.totalSetupTime / MaxSimtime)
class MachineManagedJob(MachineJobShop):
# =======================================================================
# initialise the MachineManagedJob
# =======================================================================
def initialize(self):
MachineJobShop.initialize(self)
self.type="MachineManagedJob"
#create an empty Operator Pool. This will be updated by canAcceptAndIsRequested
id = self.id+'_OP'
name=self.objName+'_operatorPool'
self.operatorPool=OperatorPool(id, name, operatorsList=[])
self.operatorPool.initialize()
self.operatorPool.operators=[]
#create a Broker
self.broker = Broker(self)
activate(self.broker,self.broker.run())
#create a Router
from Globals import G
if len(G.RoutersList)==0:
self.router=Router()
activate(self.router,self.router.run())
G.RoutersList.append(self.router)
# otherwise set the already existing router as the machines Router
else:
self.router=G.RoutersList[0]
# holds the Entity that is to be obtained and will be updated by canAcceptAndIsRequested
self.entityToGet=None
# =======================================================================
# checks if the Queue can accept an entity
# it checks also the next station of the Entity
# and returns true only if the active object is the next station
# =======================================================================
def canAccept(self, callerObject=None):
activeObject=self.getActiveObject()
activeObjectQueue=activeObject.getActiveObjectQueue()
thecaller=callerObject
if (thecaller!=None):
#check it the caller object holds an Entity that requests for current object
if len(thecaller.getActiveObjectQueue())>0:
# TODO: make sure that the first entity of the callerObject is to be disposed
activeEntity=thecaller.getActiveObjectQueue()[0]
# if the machine's Id is in the list of the entity's next stations
if activeObject.id in activeEntity.remainingRoute[0].get('stationIdsList',[]):
#return according to the state of the Queue
return len(activeObject.getActiveObjectQueue())<activeObject.capacity\
and activeObject.Up
return False
# =======================================================================
# checks if the Machine can accept an entity and there is an entity in
# some possible giver waiting for it
# also updates the giver to the one that is to be taken
# =======================================================================
def canAcceptAndIsRequested(self):
# get active and giver objects
activeObject=self.getActiveObject()
activeObjectQueue=self.getActiveObjectQueue()
giverObject=self.getGiverObject()
# dummy variables that help prioritise the objects requesting to give objects to the Machine (activeObject)
isRequested=False # is requested is dummyVariable checking if it is requested to accept an item
maxTimeWaiting=0 # dummy variable counting the time a predecessor is blocked
# loop through the possible givers to see which have to dispose and which is the one blocked for longer
for object in activeObject.previous:
if(object.haveToDispose(activeObject) and object.receiver==self):# and not object.exitIsAssigned()):
isRequested=True # if the possible giver has entities to dispose of
if(object.downTimeInTryingToReleaseCurrentEntity>0):# and the possible giver has been down while trying to give away the Entity
timeWaiting=now()-object.timeLastFailureEnded # the timeWaiting dummy variable counts the time end of the last failure of the giver object
else:
timeWaiting=now()-object.timeLastEntityEnded # in any other case, it holds the time since the end of the Entity processing
#if more than one possible givers have to dispose take the part from the one that is blocked longer
if(timeWaiting>=maxTimeWaiting):
activeObject.giver=object # set the giver
maxTimeWaiting=timeWaiting
if (activeObject.operatorPool!='None' and (any(type=='Load' for type in activeObject.multOperationTypeList)\
or any(type=='Setup' for type in activeObject.multOperationTypeList))):
if isRequested:
# TODO: check whether this entity is the one to be hand in
# to be used in operatorPreemptive
activeObject.requestingEntity=activeObject.giver.getActiveObjectQueue()[0]
# TODO: update the object requesting the operator
activeObject.operatorPool.requestingObject=activeObject.giver
# TODO: update the last object calling the operatorPool
activeObject.operatorPool.receivingObject=activeObject
if activeObject.Up and len(activeObjectQueue)<activeObject.capacity\
and self.checkOperator()\
and not activeObject.giver.exitIsAssigned():
activeObject.giver.assignExit()
# if the activeObject is not in manager's activeCallersList of the entityToGet
if self not in activeObject.giver.getActiveObjectQueue()[0].manager.activeCallersList:
# append it to the activeCallerList of the manager of the entity to be received
activeObject.giver.getActiveObjectQueue()[0].manager.activeCallersList.append(self)
# update entityToGet
self.entityToGet=activeObject.giver.getActiveObjectQueue()[0]
#make the operators List so that it holds only the manager of the current order
activeObject.operatorPool.operators=[activeObject.giver.getActiveObjectQueue()[0].manager]
# # set the variable operatorAssignedTo to activeObject, the operator is then blocked
# activeObject.operatorPool.operators[0].operatorAssignedTo=activeObject
# # TESTING
# print now(), activeObject.operatorPool.operators[0].objName, 'got assigned to', activeObject.id
# read the load time of the machine
self.readLoadTime()
return True
else:
return False
else:
# the operator doesn't have to be present for the loading of the machine as the load operation
# is not assigned to operators
if activeObject.Up and len(activeObjectQueue)<activeObject.capacity and isRequested:
# update entityToGet
self.entityToGet=self.giver.getActiveObjectQueue()[0]
return activeObject.Up and len(activeObjectQueue)<activeObject.capacity and isRequested
# =======================================================================
# to be called by canAcceptAndIsRequested and check for the operator
# =======================================================================
def checkOperator(self):
if self.giver.getActiveObjectQueue()[0].manager:
manager=self.giver.getActiveObjectQueue()[0].manager
# print ''
# print 'Entity',self.giver.getActiveObjectQueue()[0].id
# print 'manager',manager.id
return manager.checkIfResourceIsAvailable()
else:
return True
# =======================================================================
# identifies the Entity to be obtained so that
# getEntity gives it to removeEntity as argument
# =======================================================================
def identifyEntityToGet(self):
# ToDecide
# maybe we should work this way in all CoreObjects???
return self.entityToGet
# =======================================================================
# checks if the object is ready to receive an Entity
# =======================================================================
def isReadyToGet(self):
# check if the entity that is about to be obtained has a manager (this should be true for this object)
if self.entityToGet.manager:
manager=self.entityToGet.manager
if len(manager.activeCallersList)>0:
manager.sortEntities() # sort the callers of the manager to be used for scheduling rules
# return true if the manager is available
return manager.checkIfResourceIsAvailable()
else:
return True
# =======================================================================
# prepare the machine to be released
# =======================================================================
def releaseOperator(self):
self.outputTrace(self.currentOperator.objName, "released from "+ self.objName)
# # TESTING
# print now(), self.id, 'will release operator', self.operatorPool.operators[0].objName
# set the flag operatorAssignedTo to None
self.operatorPool.operators[0].operatorAssignedTo=None
self.broker.invokeBroker()
self.toBeOperated = False