Int J Performability Eng ›› 2018, Vol. 14 ›› Issue (1): 186-191.doi: 10.23940/ijpe.18.01.p20.186191

• Original articles • Previous Articles    

An Advanced Replacement Model for a Two-Unit System

Xiaoyang Ma, Xiaodong Zhang, and Rui Peng   

  1. Donlinks School of Economics and Management, University of Science and Technology Beijing, China


This paper considers an advanced replacement model for a two-unit system. One is the key unit called unit 1 and the whole system is replaced once unit 1 fails. The system is preventively replaced in order to prevent failure of unit 1. The other unit referred to as unit 2, is cheaper and easily replaceable. Unit 2 is only replaced when it fails. However, if its failure is within a threshold of the planned preventive system replacement, the system replacement is done in advance to avoid over replacements of unit 2. A framework is proposed to jointly optimize the preventive replacement interval and the threshold for advanced replacement.

Submitted on October 1, 2017; Revised on November 7, 2017; Accepted on December 5, 2017
References: 8