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Operations Research, 2nd Edition by A. M. Natarajan

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12

Queuing Models

Queue is a common word that means a waiting line or the act of joining a line. It is formed when the number of customers arriving is greater than the number of customers being served during a period of time.

Various queuing situations are:

Examples Members of Queue Server(s)
Airport runways Planes Runways
Petrol bunk Vehicles Bank employee
Library Students Counter clerk
Bank counter Account holders Counter clerk
Hospital Patient Doctor
Telephone booth Customers Telephone attendant
Traffic signal Vehicles Signal point
Barber shop Customers Barber
Ration shop Ration card holders Shop clerk

Depending on the server status, the incoming customer either waits at the queue or gets served. If the server at ...

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