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A mixed double sampling plan based on Cpk

Author

Listed:
  • Saminathan Balamurali
  • Muhammad Aslam
  • Liaquat Ahmad
  • Chi-Hyuck Jun

Abstract

Acceptance sampling plans are quality tools for the manufacturer and the customer. The ultimate result of reduction of nonconforming items will increase the profit of the manufacturer and enhance the satisfaction of the consumer. In this article, a mixed double sampling plan is proposed in which the attribute double sampling inspection is used in the first stage and a variables sampling plan based on the process capability index Cpk is used in the second stage. The optimal parameters are determined so that the producer’s and the consumer’s risks are to be satisfied with minimum average sample number. The optimal parameters of the proposed plan are estimated using different plan settings using two points on the operating characteristic curve approach. In designing the proposed mixed double sampling plan, we consider the symmetric and asymmetric nonconforming cases under variables inspection. The efficiency of the proposed plan is discussed and compared with the existing sampling plans. Tables are constructed for easy selection of the optimal plan parameters and an industrial example is also included for implementation of the proposed plan.

Suggested Citation

  • Saminathan Balamurali & Muhammad Aslam & Liaquat Ahmad & Chi-Hyuck Jun, 2020. "A mixed double sampling plan based on Cpk," Communications in Statistics - Theory and Methods, Taylor & Francis Journals, vol. 49(8), pages 1840-1857, April.
    • Handle: RePEc:taf:lstaxx:v:49:y:2020:i:8:p:1840-1857
    DOI: 10.1080/03610926.2019.1565836
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