An optimal age-replacement policy for a simple repairable system with delayed repair. (English) Zbl 1360.90115
Summary: In this article, a simple repairable system (i.e., a repairable system consisting of one component and one repairman) with delayed repair is studied. Assume that the system after repair is not “as good as new”, and the degeneration of the system is stochastic. Under these assumptions, using the geometric process repair model, we consider a replacement policy \(T\) based on system age under which the system is replaced when the system age reaches \(T\). Our problem is to determine an optimal replacement policy \(T^\ast\), such that the average cost rate (i.e., the long-run average cost per unit time) of the system is minimized. The explicit expression of the average cost rate is derived, the corresponding optimal replacement policy \(T^\ast\) can be determined by minimizing the average cost rate of the system. Finally, a numerical example is given to illustrate some theoretical results and the model’s applicability.
MSC:
| 90B25 | Reliability, availability, maintenance, inspection in operations research |
| 60K05 | Renewal theory |
| 62N05 | Reliability and life testing |
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