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A delay-time-based inspection model for parallel systems

Author

Listed:
  • Xuejuan Liu
  • Wenbin Wang
  • Rui Peng
  • Fei Zhao

Abstract

The delay-time concept has been extensively applied in the field of maintenance, especially for determining the optimal inspection or maintenance interval. It defines a two-stage system failure process: the time from new to an initial defect, known as the normal stage, and the time from this defective point to failure, known as the delay-time stage. Previous works using the delay-time concept have mainly focused on single-component systems and multi-component systems with a series configuration. However, parallel systems also exist in reality, but most existing models for parallel systems use either a single-stage time-to-failure process or a Markov chain to describe the failure mechanism. In this article, we propose a new delay-time-based inspection model for a n -component parallel system and study the optimal inspection interval that minimizes the long-term expected cost per unit time. Two maintenance policies are considered, depending on whether the defective/failed components identified are replaced immediately or not. Numerical examples are presented to show the applicability of the model.

Suggested Citation

  • Xuejuan Liu & Wenbin Wang & Rui Peng & Fei Zhao, 2015. "A delay-time-based inspection model for parallel systems," Journal of Risk and Reliability, , vol. 229(6), pages 556-567, December.
    • Handle: RePEc:sae:risrel:v:229:y:2015:i:6:p:556-567
    DOI: 10.1177/1748006X15591618
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    References listed on IDEAS

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