Modelling and optimizing sequential imperfect preventive maintenance

Modelling and optimizing sequential imperfect preventive maintenance

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Article ID: iaor20103843
Volume: 94
Issue: 1
Start Page Number: 53
End Page Number: 62
Publication Date: Jan 2009
Journal: Reliability Engineering and System Safety
Authors: , ,
Keywords: scheduling
Abstract:

This paper deals with the problem of scheduling imperfect preventive maintenance (PM) of some equipment. It uses a model due to Kijima in which each application of PM reduces the equipment's effective age (but without making it as good as new). The approach presented here involves minimizing a performance function which allows for the costs of minimal repair and eventual system replacement as well as for the costs of PM during the equipment's operating lifetime. The paper describes a numerical investigation into the sensitivity of optimum schedules to different aspects of an age-reduction model (including the situation when parts of a system are non-maintainable–i.e., unaffected by PM).

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