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4 Basic Queues and Servers

4-6

Model Basic Queueing Systems

In this section...

“Constructs Involving Queues and Servers” on page 4-6

“Example of a Logical Queue” on page 4-9

“Vary the Service Time of a Server” on page 4-10

See also the example in “Build a Discrete-Event Model” on page 2-2, which illustrates

how to create a queue-server pair and view statistics such as server utilization.

Constructs Involving Queues and Servers

Here are some examples of ways to combine FIFO Queue and Single Server blocks to

model different situations:

• “Serial Queue-Server Pairs” on page 4-6

• “Parallel Queue-Server Pairs as Alternatives” on page 4-7

• “Parallel Queue-Server Pairs in Multicasting” on page 4-7

• “Serial Connection of Queues” on page 4-8

• “Parallel Connection of Queues” on page 4-8

Serial Queue-Server Pairs

Two queue-server pairs connected in series represent successive operations that an entity

undergoes. For example, parts on an assembly line are processed sequentially by two

machines.

While you might alternatively model the situation as a pair of servers without a queue

between them, the absence of the queue means that if the first server completes service

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MATLAB SIMEVENTS RELEASE NOTES Guia do Utilizador Página 84