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A practical reliability allocation method considering modified criticality factors

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  • Yadav, Om Prakash
  • Zhuang, Xing

Abstract

Reliability allocation is a very critical step of product development process for setting achievable reliability goals. The majority of existing methods allocate system level failure rate target to subsystems or components instead of allocating failure rate reduction (improvement) targets. This approach of reliability allocation often allocates reliability goals lower than existing reliability levels. Further, the existing methods failed to effectively capture potential for improvement and impact of improvement efforts on failure effects while calculating reliability allocation weights. This paper investigates the limitations of existing approaches and proposes a modified criticality measure for allocating system level reliability improvement goal to subsystems. The modified criticality measure is developed considering non-linear phenomena for both severity rating and failure rate to capture potential for improvement. The failure rate reduction targets are assigned in proportion of improvement potential. A case example is presented to demonstrate the effectiveness of the proposed approach.

Suggested Citation

  • Yadav, Om Prakash & Zhuang, Xing, 2014. "A practical reliability allocation method considering modified criticality factors," Reliability Engineering and System Safety, Elsevier, vol. 129(C), pages 57-65.
    • Handle: RePEc:eee:reensy:v:129:y:2014:i:c:p:57-65
    DOI: 10.1016/j.ress.2014.04.003
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    References listed on IDEAS

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    1. Yadav, Om Prakash & Singh, Nanua & Goel, Parveen S., 2006. "Reliability demonstration test planning: A three dimensional consideration," Reliability Engineering and System Safety, Elsevier, vol. 91(8), pages 882-893.
    2. Kim, Kyungmee O. & Yang, Yoonjung & Zuo, Ming J., 2013. "A new reliability allocation weight for reducing the occurrence of severe failure effects," Reliability Engineering and System Safety, Elsevier, vol. 117(C), pages 81-88.
    3. Rachel R. Itabashi-Campbell & Om Prakash Yadav, 2008. "Gauging quality and reliability assurance efforts in product development process," International Journal of Process Management and Benchmarking, Inderscience Enterprises Ltd, vol. 2(3), pages 221-233.
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    Citations

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    Cited by:

    1. Kim, Kyungmee O. & Zuo, Ming J., 2018. "Optimal allocation of reliability improvement target based on the failure risk and improvement cost," Reliability Engineering and System Safety, Elsevier, vol. 180(C), pages 104-110.
    2. Qiu, Qingan & Cui, Lirong & Gao, Hongda & Yi, He, 2018. "Optimal allocation of units in sequential probability series systems," Reliability Engineering and System Safety, Elsevier, vol. 169(C), pages 351-363.

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