Abstract:

First, the original system models were established by assuming that the systems have three states (perfect work, fatigue work, failure) and a repairman, and perfect working time, fatigue working time and repair time were exponentially distributed. Second, the new system models were obtained under the conditions of the assumption that ignoring the effects of fatigue time. Final, the reliability indices of the original and the new systems including reliability, availability, mean down time and so on were discussed by using probability analysis and Laplace transform technique.

Key words: Markov repairable system; fatigue time omission; reliability indices; Multistate