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Systems Engineering by Dahai Liu

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Chapter 8

Process Modeling Using Queuing Theory and Simulation

In our everyday life, there are many so-called “waiting line systems”; for example, customers waiting in the checkout line in a grocery store, passengers waiting in line to go through the security checkpoint at an airport, and customers calling customer service and waiting in a queue to be answered in the order received. If the demand for processing exceeds the capacity of serving units, we often encounter a “wait line” system. If you look at these systems, it is not difficult to find the common features involved in these systems; (1) there is a demand for service and the demand is stochastic, that is to say, the time when a customer arrives is somewhat random and unpredictable; ...

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