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Optimal spares for stochastically failing equipment

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  • Charles H. Falkner

Abstract

A mathematical model is formulated for determining the number of spare components to purchase when components stochastically fail according to a known life distribution function and there is a cost incurred when a component is replaced. Bounds are determined for the optimal inventory which indicate that the inclusion of the replacement cost lowers the optimal inventory. Since these bounds are no easier to calculate than the optimal spares level, the theory is specialized to components with exponentially distributed time to failure. Procedures are given for calculating the optimal spares level, and numerical examples are provided.

Suggested Citation

  • Charles H. Falkner, 1969. "Optimal spares for stochastically failing equipment," Naval Research Logistics Quarterly, John Wiley & Sons, vol. 16(3), pages 287-295, September.
    • Handle: RePEc:wly:navlog:v:16:y:1969:i:3:p:287-295
    DOI: 10.1002/nav.3800160302
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