Customer/Server processes

suspends process

for unknown time

conditional

reactivation

suspends process

for unknown time

conditional

reactivation

activate customer

deletion process

customer process

suspends process

for unknown time

conditional

reactivation

suspends process

for known time

unconditional

reactivation

loop until

end of simulation

server process

customer

Wait until head

of queue

Join queue

Wait until end

of service

Leave system

end

server

Finished with

customer

Set server

to idle

Delay for

service time

Set server

to busy

Accept customer

from queue

Wait until customer ready

(queue not empty)

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