This simulator was prepared in "SimJava " package and was tested in " Netscape Communicator 4.6".
Simulator shows work of queueing system of type: M/M/n/0 (it is designation of D. Kendall), i.e. time between job arrival and time of service are exponential distributed, number of servers is "n" and system has not waiting room.
The source sends out jobs to the servers. When a server is busy with a job its work router (seen above it) passes new jobs on to the next server instead. If all the servers are busy then job will pass through all the routers and into the waste bucket. After a server finishes processing a job, it passes the result down to the work bucket, and signals its work router that it is free for more work.
Click " RUN" and you will see work of queueing system. Also you can change service time, arrival time and number of servers.