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Availability modelling and evaluation of a repairable system subject to minor deterioration under imperfect repairs

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  • Ibrahim Yusuf

Abstract

Many engineering systems are subjected to deterioration, meaning that during the course of time their conditions fall to failure levels. Such systems and their components are either repaired at failure or replaced before or after failure. However not every deterioration can bring about sudden failure of the system. Some deterioration can slightly reduce the strength of the system until at some point failure occurs. Such deterioration is said to be minor deterioration. This paper deals with the modelling and evaluation of availability of a system subjected to minor deterioration under imperfect repair. In this paper, we developed the explicit expression of system availability using probabilistic approach and determine the effect of failure, repair rate and number of states on system availability. The optimal availability level the system can attain is also determined. The results of this paper will enhance the system performance and useful for timely execution of proper maintenance improvement, decision, planning and optimisation.

Suggested Citation

  • Ibrahim Yusuf, 2015. "Availability modelling and evaluation of a repairable system subject to minor deterioration under imperfect repairs," International Journal of Mathematics in Operational Research, Inderscience Enterprises Ltd, vol. 7(1), pages 42-51.
    • Handle: RePEc:ids:ijmore:v:7:y:2015:i:1:p:42-51
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