Int. J. of Industrial and Systems Engineering   »   2010 Vol.6, No.3

 

 

Title: A dynamic opportunistic preventive maintenance policy for multi-unit series systems with intermediate buffers

 

Author: Xiaojun Zhou, Zhiqiang Lu, Lifeng Xi

 

Addresses:
Department of Industrial Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, No. 800 Dong Chuan Road, Shanghai 200240, China.
Department of Industrial Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, No. 800 Dong Chuan Road, Shanghai 200240, China.
Department of Industrial Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, No. 800 Dong Chuan Road, Shanghai 200240, China

 

Abstract: Commonly, for a multi-unit series system, whenever one of the units stops to perform a preventive maintenance action, preventive maintenance opportunities arise for the other units because combining the preventive maintenance activities can save the system-dependent cost (i.e. downtime cost). This article proposes an opportunistic preventive maintenance policy for multi-unit series systems based on dynamic programming, with integrating the online information of the intermediate buffers. Whenever one of the units reaches its reliability threshold, a preventive maintenance action has to be performed on that unit. An optimal preventive maintenance practice is determined by maximising the short-term cumulative opportunistic maintenance cost savings for the whole system which is a combination of the maintenance cost saving, the downtime cost saving, the penalty cost for advancing the preventive maintenance action and the penalty cost for work in process. Finally, a numerical example is given throughout to show how this approach works.

 

Keywords: preventive maintenance; opportunistic maintenance; dynamic programming; multi-unit series systems; intermediate buffers; system-dependent costs; downtime costs; online information; reliability thresholds; short-term cost savings; penalty costs; work in process; optimisation; maintenance policy.

 

DOI: 10.1504/IJISE.2010.035012

 

Int. J. of Industrial and Systems Engineering, 2010 Vol.6, No.3, pp.276 - 288

 

Available online: 01 Sep 2010

 

 

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