A program to calculate bootstrap confidence intervals for the process capability index Cpk |
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| Authors: | Gary S. Wasserman Hassan A. Mohsen LeRoy A. Franklin |
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| Affiliation: | 1. Department of Industrial and Manufacturing Engineering , Wayne State University , Detroit, MI, 48202, USA;2. Decision Sciences Department , Indiana State University , Terre Haute, IN, 47809, USA |
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| Abstract: | Franklin and Wasserman (1991) introduced the use of Bootstrap sampling procedures for deriving nonparametric confidence intervals for the process capability index, Cpk, which are applicable for instances when at least twenty data points are available. This represents a significant reduction in the usually recommended sample requirement of 100 observations (see Gunther 1989). To facilitate and encourage the use of these procedures. a FORTRAN program is provided for computation of confidence intervals for Cpk. Three methods are provided for this calculation including the standard method, the percentile confidence interval, and the biased - corrected percentile confidence interval. |
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| Keywords: | Cpk process capability index bootstrap sampling |
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