The CAPABILITY Procedure

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Vännmann, K. (1997). “A General Class of Capability Indices in the Case of Asymmetric Tolerances.” Communications in Statistics—Theory and Methods 26:2049–2072.

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Wright, P. A. (1995). “A Process Capability Index Sensitive to Skewness.” Journal of Statistical Computation and Simulation 52:195–203.

Zhang, N. F., Stenback, G. A., and Wardrop, D. M. (1990). “Interval Estimation of Process Capability Index Cpk.” Communications in Statistics—Theory and Methods 19:4455–4470.