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Comparison of two maintenance policies for a multi-unit system considering production and demand rates

Nooshin Salari and Viliam Makis

International Journal of Production Economics, 2017, vol. 193, issue C, 381-391

Abstract: In this paper, two new condition-based maintenance policies are developed for a multi-unit system. This study integrates maintenance, production and demand into a single model. The system consists of N identical, independent units, each subject to gradual deterioration. Production rate of each unit varies in different working states and demand rate of the system is assumed to be constant. Cost of sending maintenance crew to perform maintenance is high, so simultaneous replacement of several units can be cost effective. Units are inspected at equidistant time epochs, and if production rate of the system at an inspection time is below a critical level, maintenance is initiated. First maintenance policy prescribes corrective replacement of failed units, and second maintenance policy prescribes corrective replacement of failed units as well as preventive maintenance of unhealthy units.

Keywords: Condition-based maintenance (CBM); Multi-unit system; Production system; Semi-Markov decision process (SMDP) (search for similar items in EconPapers)
Date: 2017
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