Analysis for a two‐dissimilar‐component cold standby repairable system with repair priority

Analysis for a two‐dissimilar‐component cold standby repairable system with repair priority

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Article ID: iaor20119157
Volume: 96
Issue: 11
Start Page Number: 1542
End Page Number: 1551
Publication Date: Nov 2011
Journal: Reliability Engineering and System Safety
Authors: , ,
Keywords: stochastic processes, quality & reliability
Abstract:

In this paper, a cold standby repairable system consisting of two dissimilar components and one repairman is studied. Assume that working time distributions and repair time distributions of the two components are both exponential, and Component 1 has repair priority when both components are broken down. After repair, Component 1 follows a geometric process repair while Component 2 obeys a perfect repair. Under these assumptions, using the perfect repair model, the geometric process repair model and the supplementary variable technique, we not only study some important reliability indices, but also consider a replacement policy T, under which the system is replaced when the working age of Component 1 reaches T. Our problem is to determine an optimal policy T * such that the long‐run average loss per unit time (i.e. average loss rate) of the system is minimized. The explicit expression for the average loss rate of the system is derived, and the corresponding optimal replacement policy T * can be found numerically. Finally, a numerical example for replacement policy T is given to illustrate some theoretical results and the model's applicability.

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