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An Extended Periodic Imperfect Preventive Maintenance Model With Age-Dependent Failure Type

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2 Author(s)
Shey-Huei Sheu ; Dept. of Ind. Manage., Nat. Taiwan Univ. of Sci. & Technol., Taipei ; Chin-Chih Chang

This paper presents a generalized periodic imperfect preventive maintenance (PM) model for a system with age-dependent failure type. The imperfect PM model proposed in this study incorporates improvement factors vis-a-vis the hazard-rate function, and effective age. As failures occur, the system experiences one of the two types of failure: type-I failure (minor), and type-II failure (catastrophic). Type-I failures are rectified with minimal repair. In a PM period, the system is preventively maintained following the occurrence of a type-II failure, or at age T, whichever takes place first. At the N th PM, the system is replaced. An approach that generalizes the existing studies on the periodic PM policy is proposed. Taking age-dependent failure type into consideration, the objective consists of determining the optimal PM & replacement schedule that minimize the expected cost per unit of time, over an infinite horizon.

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Reliability, IEEE Transactions on  (Volume:58 ,  Issue: 2 )