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Queueing Models for Spares Provisioning.
GEORGE WASHINGTON UNIV WASHINGTON D C PROGRAM IN LOGISTICS
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A population of items which break down at random times and require repair are studied the classic machine repair problem. It is desired to determine the number of repairmen and spares required over a multi-year planning horizon to provide for a service criterion of 90 availability. When an item fails, it is transported to the repair depot, repaired, and then transported to the spares pool which is constrained to be empty not more than 10 of the time. The first model considered treats transportation and repair as one service operation. The second model is a series queue which allows for the separate treatment of transportation and repair. Breakdowns are assumed Poisson and repair times, exponential.
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