Generalization of the proportional hazards model for maintenance modelling and optimization

Estelle Deloux, Yann Dijoux and Mitra Fouladirad

Journal of Risk and Reliability, 2012, vol. 226, issue 5, 439-447

Abstract: A non-observable monotonically deteriorating system is considered. The observed data are the maintenance times and the kinds of maintenance performed. The aim of this paper is to propose a model of the dependency between all kinds of maintenance by considering imperfect maintenance efficiency. Furthermore, we present an additional planned preventive maintenance policy that reduces a finite horizon average total maintenance cost. To deal with such a problem a competing risks model is considered. A general class of models, denoted generalized proportional hazards, is presented and a particular model is derived. An estimation method is detailed for the proposed model. Finally, by numerical implementation, a maintenance policy that leads to the lowest finite horizon average total maintenance cost is proposed.

Keywords: preventive maintenance; corrective maintenance; deterioration process; gamma process; generalized proportional hazards model; competing risk model. (search for similar items in EconPapers)
Date: 2012
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Persistent link: https://EconPapers.repec.org/RePEc:sae:risrel:v:226:y:2012:i:5:p:439-447

DOI: 10.1177/1748006X12448149

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