def get_single_resource_utilization_problem(self, problem_name):
problem = ps.SchedulingProblem("IndicatorFlowtimeSingleResource1", horizon=50)
dur1 = 5
dur2 = 5
dur3 = 4
dur4 = 3
dur5 = 2
t_1 = ps.FixedDurationTask("T1", duration=dur1)
t_2 = ps.FixedDurationTask("T2", duration=dur2)
t_3 = ps.FixedDurationTask("T3", duration=dur3)
t_4 = ps.FixedDurationTask("T4", duration=dur4)
t_5 = ps.FixedDurationTask("T5", duration=dur5)
worker_1 = ps.Worker("Worker1")
t_1.add_required_resource(worker_1)
t_2.add_required_resource(worker_1)
t_3.add_required_resource(worker_1)
t_4.add_required_resource(worker_1)
t_5.add_required_resource(worker_1)
ps.TaskEndBeforeLax(t_3, 35)
ps.TaskEndBeforeLax(t_2, 35)
ps.TaskEndBeforeLax(t_1, 35)
ps.TaskEndBeforeLax(t_4, 35)
ps.TaskEndBeforeLax(t_5, 35)
ps.TaskStartAfterLax(t_3, 10)
ps.TaskStartAfterLax(t_2, 10)
ps.TaskStartAfterLax(t_1, 10)
ps.TaskStartAfterLax(t_4, 10)
ps.TaskStartAfterLax(t_5, 10)
return problem, worker_1, dur1 + dur2 + dur3 + dur4 + dur5
def test_operator_and_(self) -> None:
new_problem_or_clear()
t_1 = ps.FixedDurationTask("t1", duration=2)
and_constraint = ps.and_(
[ps.TaskStartAfterLax(t_1, 1), ps.TaskEndBeforeLax(t_1, 7)]
)
self.assertIsInstance(and_constraint, ps.BoolRef)
def test_resource_tasks_distance_double_time_period_2(self) -> None:
"""Same as above, but force the tasks to be scheduled within the time intervals"""
pb = ps.SchedulingProblem("ResourceTasksDistanceMultiTimePeriod2")
tasks = [
ps.FixedDurationTask("task%i" % i, duration=1) for i in range(4)
]
worker_1 = ps.Worker("Worker1")
for t in tasks:
t.add_required_resource(worker_1)
c1 = ps.ResourceTasksDistance(worker_1,
distance=4,
mode="exact",
time_periods=[[10, 20], [30, 40]])
pb.add_constraint(c1)
# add a makespan objective, all tasks should be scheduled from 0 to 4
pb.add_constraint(ps.TaskStartAt(tasks[0], 10))
pb.add_constraint(ps.TaskStartAfterLax(tasks[1], 10))
pb.add_constraint(ps.TaskEndBeforeLax(tasks[1], 20))
pb.add_constraint(ps.TaskStartAt(tasks[2], 30))
pb.add_constraint(ps.TaskStartAfterLax(tasks[3], 30))
pb.add_constraint(ps.TaskEndBeforeLax(tasks[3], 40))
# as a consequence, task2 should be scheduled 4 periods after and start at 15
solver = ps.SchedulingSolver(pb)
solution = solver.solve()
self.assertTrue(solution)
self.assertEqual(solution.horizon, 36)
t0_start = solution.tasks[tasks[0].name].start
t1_start = solution.tasks[tasks[1].name].start
t2_start = solution.tasks[tasks[2].name].start
t3_start = solution.tasks[tasks[3].name].start
t0_end = solution.tasks[tasks[0].name].end
t1_end = solution.tasks[tasks[1].name].end
t2_end = solution.tasks[tasks[2].name].end
t3_end = solution.tasks[tasks[3].name].end
self.assertEqual(t0_start, 10)
self.assertEqual(t0_end, 11)
self.assertEqual(t1_start, 15)
self.assertEqual(t1_end, 16)
self.assertEqual(t2_start, 30)
self.assertEqual(t2_end, 31)
self.assertEqual(t3_start, 35)
self.assertEqual(t3_end, 36)
def test_operator_and_1(self) -> None:
pb = ps.SchedulingProblem("OperatorAnd1", horizon=23)
t_1 = ps.FixedDurationTask("t1", duration=2)
and_constraint = ps.and_(
[ps.TaskStartAfterLax(t_1, 3),
ps.TaskEndBeforeLax(t_1, 5)])
self.assertIsInstance(and_constraint, ps.BoolRef)
pb.add_constraint(and_constraint)
solution = ps.SchedulingSolver(pb).solve()
self.assertTrue(solution)
self.assertEqual(solution.tasks["t1"].start, 3)
def get_single_resource_utilization_problem_2(time_intervals):
horizon = time_intervals[-1][-1] + 3
nb_tasks = [5 for interval in time_intervals if interval[1] - interval[0] > 3]
problem = ps.SchedulingProblem(
"IndicatorFlowtimeSingleResource", horizon=horizon
)
worker_1 = ps.Worker("Worker1")
tasks: list[ps.FixedDurationTask] = []
for interval, nb_tasks_i in zip(time_intervals, nb_tasks):
for _ in range(nb_tasks_i):
tasks.append(ps.FixedDurationTask("T%s" % len(tasks), duration=1))
tasks[-1].add_required_resource(worker_1)
ps.TaskStartAfterLax(tasks[-1], interval[0])
ps.TaskEndBeforeLax(tasks[-1], interval[1])
return problem, worker_1, len(tasks)
def test_optional_tasks_end_before_strict_end_before_lax(self) -> None:
pb = ps.SchedulingProblem("OptionalTasksEndBefore", horizon=8)
task_1 = ps.FixedDurationTask("task1", duration=3) # mandatory
task_2 = ps.FixedDurationTask("task2", duration=4,
optional=True) # optional
# force task_2 to be scheduled
pb.add_constraint(task_2.scheduled == True)
pb.add_constraint(ps.TaskEndBeforeStrict(task_2, 7))
pb.add_constraint(ps.TaskEndBeforeLax(task_2, 4))
solver = ps.SchedulingSolver(pb)
solution = solver.solve()
self.assertTrue(solution)
self.assertTrue(solution.tasks[task_1.name].scheduled)
self.assertTrue(solution.tasks[task_2.name].scheduled)
self.assertEqual(solution.tasks[task_2.name].start, 0)
self.assertEqual(solution.tasks[task_2.name].end, 4)
def test_create_task_before_lax(self) -> None:
new_problem_or_clear()
task = ps.FixedDurationTask("task", 2)
constraint = ps.TaskEndBeforeLax(task, 3)
self.assertIsInstance(constraint, ps.TaskEndBeforeLax)
self.assertEqual(constraint.value, 3)