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Optimal component replacement decisions using vibration monitoring and the proportional-hazards model

Author

Listed:
  • P J Vlok

    (University of Pretoria)

  • J L Coetzee

    (University of Pretoria)

  • D Banjevic

    (University of Toronto)

  • A K S Jardine

    (University of Toronto)

  • V Makis

    (University of Toronto)

Abstract

This paper describes a case study in which the Weibull proportional-hazards model is used to determine the optimal replacement policy for a critical item which is subject to vibration monitoring. Such an approach has been used to date in the context of monitoring through oil debris analysis, and this approach is extended in this paper to the vibration monitoring context. The Weibull proportional-hazards model is reviewed along with the software EXAKT used for optimization. In particular the case considers condition-based maintenance for circulating pumps in a coal wash plant that is part of the SASOL petrochemical company. The condition-based maintenance policy recommended in this study is based on histories collected over a period of 2 years, and is compared with current practice. The policy is validated using data that arose from subsequent operation of the plant.

Suggested Citation

  • P J Vlok & J L Coetzee & D Banjevic & A K S Jardine & V Makis, 2002. "Optimal component replacement decisions using vibration monitoring and the proportional-hazards model," Journal of the Operational Research Society, Palgrave Macmillan;The OR Society, vol. 53(2), pages 193-202, February.
    • Handle: RePEc:pal:jorsoc:v:53:y:2002:i:2:d:10.1057_palgrave.jors.2601261
    DOI: 10.1057/palgrave.jors.2601261
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