Example - bank, 3 clerks.py

# Example - bank, 3 clerks.py
import salabim as sim


class CustomerGenerator(sim.Component):
    def process(self):
        while True:
            Customer()
            yield self.hold(sim.Uniform(5, 15).sample())


class Customer(sim.Component):
    def process(self):
        self.enter(waitingline)
        for clerk in clerks:
            if clerk.ispassive():
                clerk.activate()
                break  # activate only one clerk
        yield self.passivate()


class Clerk(sim.Component):
    def process(self):
        while True:
            while len(waitingline) == 0:
                yield self.passivate()
            self.customer = waitingline.pop()
            yield self.hold(30)
            self.customer.activate()


env = sim.Environment(trace=False)
CustomerGenerator(name='customergenerator')
clerks = sim.Queue('clerks')
for i in range(3):
    Clerk().enter(clerks)
waitingline = sim.Queue('waitingline')

env.run(till=50000)
waitingline.length.print_histogram(30, 0, 1)
print()
waitingline.print_info()
waitingline.print_statistics()

waitingline.length.print_histogram(30, 0, 1)
print()
waitingline.length_of_stay.print_histogram(30, 0, 10)

waitingline.length_of_stay.print_statistics()
waitingline.length.print_statistics()