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Optimal replacement policies with repair numbers for mission-oriented systems

Author

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  • Cai, Jiajia
  • Zhao, Xufeng

Abstract

In this study, we take mission durations into account and propose optimal replacement policies with repair numbers for mission-oriented systems. These systems generally undertake missions without opportunities for planned replacements. As the mission duration increases, replacement should be carried out earlier to maintain the system’s reliability. However, if such a system adopts a traditional maintenance policy that neglects mission durations, the optimal number of repairs may be overestimated. This indicates that the planned replacement is not conducted in a timely manner, which leads to a lower reliability of the system. To tackle this issue, we develop replacement policies that are implemented after the Kth repair or at the mission end time, whichever occurs first. To balance cost and maintainability, replacement last policy is also considered. Optimal parameters are determined both analytically and numerically. Finally, the effectiveness of the proposed policies is verified by comparing them with traditional maintenance policies.

Suggested Citation

  • Cai, Jiajia & Zhao, Xufeng, 2025. "Optimal replacement policies with repair numbers for mission-oriented systems," Reliability Engineering and System Safety, Elsevier, vol. 262(C).
    • Handle: RePEc:eee:reensy:v:262:y:2025:i:c:s0951832025003552
    DOI: 10.1016/j.ress.2025.111154
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    References listed on IDEAS

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