On Optimal Replacement Policies for a Deteriorating System

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Journal of Korean Society for Quality Management > Volume 30(4); 2002 > Article

Journal of Korean Society for Quality Management 2002;30(4): 94-.

기능저하 시스템에서의 최적 교체 정책

서순근, 조유희

동아대학교 공과대학 산업시스템공학과

On Optimal Replacement Policies for a Deteriorating System

ABSTRACT

In this paper, replacement problems for a deteriorating system are considered. In the system under consideration, the successive lifetimes after repair become shorter and shorter, while the consecutive repair times become longer and longer. More specifically, the lifetimes of the system form a nonhomogeneous Poisson process, whereas the consecutive repair times constitute a stochastically increasing geometric process. Optimal replacement policies for the long-run average cost rate and the steady state availability are considered. Also taking the cost and the availability into consideration at the same time, the properties of optimal policies under the Cost Priority Policy and the Availability Priority Policy are obtained.

Key Words: NHPP;Geometric Process;Optimal Replacement Policy;Cost Priority Policy;Availability Priority Policy;