Title: An optimal joint maintenance and spare parts inventory model

Authors: Parag Jafar Siddique; Huynh Trung Luong; Muhammad Shafiq

Addresses: School of Business and Economics, United International University, Dhaka, Bangladesh ' Industrial and Manufacturing Engineering, School of Engineering and Technology, Asian Institute of Technology, Pathumthani, Thailand ' Department of Industrial Engineering, University of Engineering and Technology, Taxila, Pakistan

Abstract: Optimised maintenance of plant machineries is one of the important tasks to reduce plant operating cost. To carry out these maintenance tasks smoothly, development of spare parts inventory policy is the most prioritised issue. This research aims at the derivation of a joint maintenance and spare parts inventory model for a multi-component system. The decision variables are the order quantity and the ratio of ordering interval to preventive maintenance interval. We used block-based maintenance policy and periodic review inventory policy in this study. At first, a cost function is developed assuming that failure occurrences follow Poisson process with a constant failure rate and machine failures are non-repairable. Second, the model is further expanded for the case when failure occurrences follow non-homogeneous Poisson process and machine failures are repairable. The applicability of the developed models is demonstrated by numerical examples. Sensitivity analysis is also conducted to examine the effects of input parameters.

Keywords: maintenance; spare parts; block-based maintenance; periodic review inventory; non-homogeneous Poisson process; repairable system; non-repairable system.

DOI: 10.1504/IJISE.2018.091899

International Journal of Industrial and Systems Engineering, 2018 Vol.29 No.2, pp.177 - 192

Received: 15 Oct 2015
Accepted: 21 Jun 2016
Published online: 21 May 2018 *

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