Waiting Line Interactive Model

The Waiting Line Interactive Model was introduced in Chapter 9 to simulate a typical customer/server relationship. The random events for customer arrivals are generated according to Poisson distribution whose parameter l can be chosen from the pull-down list "Arrival Rate"; the random events for server services are generated according to negative exponential distribution whose parameter m can be chosen from the pull-down list "Service Rate". Users can select one or two phases for the service, and select the number of servers for each phase from the pull-down list "NS1" or "NS2".  Clicking on "start" begins the simulation. Performance statistics are kept and reported upon completion of the simulation.

Definitions:

1. NS1: The number of servers in Phase 1.
2. NS2: The number of servers in Phase 2.
3. Wq: The average time customers wait in line.
4. Ws: The average time customers spend in the system (waiting in line and service time).
5. Lq: The average number of customers waiting for service.
6. Ls: The average number of customers in the system (waiting and/or being served).