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Testing manufacturing performance based on capability index C pm

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Abstract

The loss-based process capability index Cpm, sometimes called the Taguchi index, has been proposed to the manufacturing industry to measure process performance. In this paper, we propose a method to assess the performance of a normally distributed process. We implement the theory of testing hypothesis using the natural estimator of Cpm, and provide an efficient program to calculate the p-values. We also provide tables of the critical values for some commonly used capability requirements. Based on the test, we develop a simple step-by-step procedure for in-plant applications.

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Authors and Affiliations

  1. Center of General Education, National Chin-Yi Institute of Technology, Taiwan

    P.C. Lin

  2. Department of Industrial Engineering & Management, National Chiao Tung University, Taiwan

    W.L. Pearn

Authors
  1. P.C. Lin
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  2. W.L. Pearn
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Correspondence to P.C. Lin.

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Lin, P., Pearn, W. Testing manufacturing performance based on capability index C pm . Int J Adv Manuf Technol 27, 351–358 (2005). https://doi.org/10.1007/s00170-004-2182-8

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  • DOI: https://doi.org/10.1007/s00170-004-2182-8

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