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A New Fuzzy Process Capability Index for Asymmetric Tolerance Interval

Author

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  • Zainab Abbasi Ganji

    (Ferdowsi University of Mashhad, Mashhad, Iran)

  • Bahram Sadeghpour Gildeh

    (Ferdowsi University of Mashhad, Mashhad, Iran)

Abstract

Process capability indices are used to evaluate the performance of the manufacturing process. When the specification limits and the target value are not precise, the authors cannot use the traditional methods to assess the capability of the process. For the processes with asymmetric tolerance intervals, some fuzzy process capability indices have been introduced such as and . In some cases, these indices may fail to account the process performance. To overcome the problem with them, the authors propose two new fuzzy indices in the case that the specification limits and the target value are fuzzy while the data are crisp. Also, the authors present an application example to demonstrate effectiveness and performance of the proposed indices.

Suggested Citation

  • Zainab Abbasi Ganji & Bahram Sadeghpour Gildeh, 2017. "A New Fuzzy Process Capability Index for Asymmetric Tolerance Interval," International Journal of Fuzzy System Applications (IJFSA), IGI Global, vol. 6(3), pages 74-104, July.
    • Handle: RePEc:igg:jfsa00:v:6:y:2017:i:3:p:74-104
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