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Paper   IPM / M / 16547
School of Mathematics
  Title:   Optimal preventive maintenance for repairable weighted k-out-of-n systems
  Author(s):  Majid Asadi (Joint with K. Hamdan and M. Tavangar)
  Status:   Published
  Journal: Reliability Engineering and System Safety
  Vol.:  205
  Year:  2021
  Pages:   107267
  Supported by:  IPM
Weighted k-out-of-n systems form an important class of redundant systems with a wide range of applications in reliability engineering. In this paper, we introduce novel optimal preventive maintenance models for the class of weighted k-out-of-n systems based on some well-known criteria such as cost criterion and availability criterion. Using the concept of signature of the system and depending on the average number of failed components, we set up a cost (availability) function corresponding to the time that the total weights of the working components become less than a predetermined threshold m, or the age of the system reaches TPM. Some examples of weighted k-out-of-n are presented to demonstrate the proposed models numerically and graphically. A related sensitivity analysis is performed to illustrate the effects of the parameters on the proposed cost and availability functions.

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