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Optimal Periodic Preventive Maintenance Schedule When Preventive Maintenance is Imperfect  

Kim, Dae-Kyung (Department of Statistics, Chonbuk National University)
Shin, Sang-Wook (Department of Statistics, Hallym University)
Lim, Jae-Hak (Department of Accounting, Hanbat National University)
Publication Information
Journal of Korean Society for Quality Management / v.35, no.4, 2007 , pp. 140-146 More about this Journal
Abstract
In this paper, we consider a periodic imperfect preventive maintenance(PM) policy in which the system's failure rate after each PM remains unchanged. The system undergoes only minimal repairs at failures between PMs. Exact mathematical formula of the expected cost rate per unit time is derived. Optimal number of PMs and optimal maintenance period are derived by minimizing the expected cost rate per unit time. A numerical example is provided to illustrate the proposed approach under Weibull lifetime distribution.
Keywords
Preventive Maintenance; Imperfect Maintenance; Hazard Rate; Expected Cost Rate per Unit Time; Weibull Distribution;
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