Maintenance of continuously degrading systems considering random service delays

Zhaojun Li, Haitao Liao, Ling Yau Chan, Elsayed A. Elsayed

Research output: Contribution to conferencePaperpeer-review

3 Scopus citations


A system coupled with condition monitoring may be maintained when the system state crosses a maintenance threshold. However, this just-in-time maintenance strategy, quite often, may not be viable due to various delays in service such as waiting for parts and maintenance facility. Consequently, determining a maintenance threshold becomes a challenging problem. The problem is more complex when imperfect maintenance is considered. This paper provides an imperfect maintenance model and derives a so-called optimal lower bound of maintenance threshold to mitigate the impact of service delays. The objective is to maximize the availability of the overall system.

Original languageEnglish (US)
Number of pages6
StatePublished - 2008
Externally publishedYes
EventIIE Annual Conference and Expo 2008 - Vancouver, BC, Canada
Duration: May 17 2008May 21 2008


OtherIIE Annual Conference and Expo 2008
CityVancouver, BC


  • Condition based maintenance
  • Optimization
  • Service delays

ASJC Scopus subject areas

  • Computer Science Applications
  • Software
  • Industrial and Manufacturing Engineering


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