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Optimal Preventive Maintenance Rate for Best Availability With Hypo-Exponential Failure Distribution

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3 Author(s)
Meng-Lai Yin ; Electr. & Comput. Eng. Dept., California State Polytech. Univ., Pomona, CA, USA ; Angus, J.E. ; Trivedi, K.S.

The optimal rate of periodic preventive maintenance to achieve the best availability is studied for Markov systems with multiple degraded operational stages, where the time-to-failure has a hypo-exponential distribution. An analytical expression is developed for the availability of such systems having n operational stages, and a necessary and sufficient condition is derived for a non-trivial optimal rate of periodic maintenance to exist. Numerical procedures for finding the optimal rate of periodic maintenance are given, and examples are presented.

Published in:

Reliability, IEEE Transactions on  (Volume:62 ,  Issue: 2 )