Cost analysis for multi-component system with failure interaction under renewing free-replacement warranty

Bin Liu, Jun Wu, Min Xie

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)


In a multi-component system, the assumption of failure independence among components is seldom valid, especially for those complex systems with complicated failure mechanism. For such systems, warranty cost is subject to all the factors including system configuration, quality of each component and the extent of failure dependence among components. In this paper, a model is developed based on renewing free-replacement warranty by considering failure interaction among components. It is assumed that whenever a component (subsystem) fails, it can induce a failure of one or more of the remaining components (subsystems). Cost models for series and parallel system configurations are presented, followed by numerical examples with sensitivity analysis. The results show that, compared with series systems, warranty cost for parallel systems is more sensitive to failure interaction.
Original languageEnglish
Pages (from-to)874-882
Number of pages9
JournalEuropean Journal of Operational Research
Issue number3
Early online date27 Jan 2015
Publication statusPublished - 16 Jun 2015


  • multi-component system
  • failure interaction
  • renewing free-replacement warranty

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