Int. J. Strategic Engineering Asset Management, Vol. 2, No. 1, 2014 37 Copyright © 2014 Inderscience Enterprises Ltd. Selective maintenance considering two types of failure modes Mayank Pandey and Ming J. Zuo* Department of Mechanical Engineering, University of Alberta, Edmonton, Alberta, T6G 2G8, Canada E-mail: mayank@ualberta.ca E-mail: ming.zuo@ualberta.ca *Corresponding author Abstract: Owing to limited maintenance resources, it may not be possible to perform all feasible maintenance actions on a system during the maintenance break between two successive missions. A subset of maintenance actions can then be selected from the available maintenance options so that the system can meet the next mission requirement. This maintenance policy is called selective maintenance. In this paper, selective maintenance has been performed for a system that has been subjected to the two types of failure modes: maintainable and the non-maintainable failure modes. The hazard rate due to the maintainable failure modes depends on the cumulative effect of the non-maintainable failure modes. A model has been used to show this relationship. An illustrative example has been used to demonstrate the effect of the two failure modes and the advantages of imperfect maintenance in selective maintenance decision making. Keywords: selective maintenance; asset management; maintainable failure mode; non-maintainable failure mode; imperfect maintenance; differential evolution. Reference to this paper should be made as follows: Pandey, M. and Zuo, M.J. (2014) ‘Selective maintenance considering two types of failure modes’, Int. J. Strategic Engineering Asset Management, Vol. 2, No. 1, pp.37–62. Biographical notes: Mayank Pandey is a PhD candidate in the Department of Mechanical Engineering at the University of Alberta, Edmonton, Canada. He received his BTech in Mechanical Engineering from M.J.P. Rohilkhand University, Bareilly, India in 2005 and MTech in Manufacturing Engineering from NIFFT, Ranchi, India in 2007. His research interests include reliability modelling and application, maintenance modelling and scheduling, condition-based maintenance, selective maintenance and optimisation. He is a member of IEEE. Ming J. Zuo received his BSc in Agricultural Engineering in 1982 from Shandong Institute of Technology, China, MSc in 1986 and PhD in 1989 both in Industrial Engineering from Iowa State University, Ames, Iowa, USA. He is currently a Full Professor in the Department of Mechanical Engineering at the University of Alberta, Canada. His research interests include system reliability analysis, maintenance modelling and optimisation, signal processing, and fault diagnosis. He is a Regional Editor for North and South American Region for International Journal of Strategic Engineering Asset Management (ISEAM).