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<p>In this paper, we consider two-phase opportunity-based age replacement models in discrete time, where the inter-arrival times of replacement opportunities follow an independent and identical geometric distribution. We examine a restricted duration for the arrival of opportunities in opportunity-based age replacement models with replacement first and replacement last disciplines. Six expected cost models are formulated by considering the priority of multiple replacement options for each discipline. The optimal two-phase preventive replacement policies are characterized by minimizing the long-run average costs. Moreover, we study unified replacement models with deterministic priorities for each discipline. Numerical experiments are presented to compare these two replacement policies with replacement first and replacement last disciplines.</p>

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Optimal two-phase opportunity-based age replacement policies in discrete time for sustainable systems

  • 期刊论文

  • 发表日期：

    2025年11月5日

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  • Liqu Lin,
  • Jing Wu,
  • Jingji Xu,
  • Xufeng Zhao

摘要

In this paper, we consider two-phase opportunity-based age replacement models in discrete time, where the inter-arrival times of replacement opportunities follow an independent and identical geometric distribution. We examine a restricted duration for the arrival of opportunities in opportunity-based age replacement models with replacement first and replacement last disciplines. Six expected cost models are formulated by considering the priority of multiple replacement options for each discipline. The optimal two-phase preventive replacement policies are characterized by minimizing the long-run average costs. Moreover, we study unified replacement models with deterministic priorities for each discipline. Numerical experiments are presented to compare these two replacement policies with replacement first and replacement last disciplines.