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Permutation Methods for Comparing Process Capabilities

Summary: [This abstract is based on the author's abstract.]Quality managers rely on statistical comparison of competing manufacturing processes to help in the selection of potential suppliers of products and manufacturing methodologies. Because the quality metrics that influence selection criteria are based on sample process data, the inherent variability in the estimates must be considered. Solutions to this problem are proposed based on permutation testing methodology. The advantage of using this methodology is that the significance levels of the permutation tests are exact regardless of the distribution of the process data. Several examples demonstrate the methodology, and potential performance is investigated empirically.

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  • Topics: Supplier Quality
  • Keywords: Supplier rating,Bootstrap methods,Multiple comparisons,Randomization tests
  • Author: Polansky, Alan M.
  • Journal: Journal of Quality Technology