Journal of Korean Society for Quality Management (품질경영학회지)

Korean Society for Quality Management (한국품질경영학회)
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Optimal Preventive Maintenance Policy for a Repairable System

수리 가능한 시스템에서의 최적 예방 보전 정책

  • Ji Hwan Cha (Department of Statistics, Seoul National University) ;
  • Jong Tae Jung (Department of Statistics, Seoul National University) ;
  • Jae Joo Kim (Department of Statistics, Seoul National University)
  • Published : 2001.06.01
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Abstract

In this paper, a preventive maintenance(PM) policy for a repairable system is considered. The failure rate model proposed by Park et at.(2000) is generalized by assuming that after each PM not only the PM slows down the degradation process of the system but also reduces down the system failure rate by a certain fixed amount. Long-run expected cost rate of the PM policy is derived and the properties of joint solution of the optimal PM period and optimal number of PM which minimizes the expected cost rate are obtained. Numerical examples for the case of a Weibull-type failure rate are given.

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