11
Queueing Theory
11.1 Introduction
It is an important area of applied probability theory. A queue is a waiting line, an orderly line of one or more persons or jobs, e.g. a waiting line at a ticket booking counter at a cinema hall, railway or bus station. Queues are also common in computer systems. There are queues of enquiries waiting to be processed by an interactive computer system, e.g. queues of database records and queues of input–output requests.
11.2 Queues or Waiting Lines
They are not only of human beings or animals but also of the aeroplanes seeking to land at a busy airport, trains waiting outside the railway station for clearance of a platform and signal permitting entry of a train at a busy railway station, ships to be unloaded, ...
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