Periodic and sequential preventive maintenance policies

Abstract

This paper considers periodic and sequential preventive maintenance (PM) policies for the system with minimal repair at failure: the PM is done ( i ) at periodic times kx and (ii) at constant intervals x k ( k = 1, 2, ···, N). The system has a different failure distribution between PM'S and is replaced at the Nth PM. The optimal policies which minimize the expected cost rates are discussed. The optimal x and N of periodic PM and { x k } of sequential PM are easily computed in a Weibull distribution case.