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South African Journal of Industrial Engineering
versão On-line ISSN 2224-7890
versão impressa ISSN 1012-277X
Resumo
ADEOTI, O.A. e OLAOMI, J.O.. Process capability index-based control chart for variables. S. Afr. J. Ind. Eng. [online]. 2017, vol.28, n.2, pp.28-36. ISSN 2224-7890. http://dx.doi.org/10.7166/28-2-1353.
This paper proposes a process capability index-based control chart for variables using the Downton estimator with a specified Cpvalue. The proposed chart is able to address the issue of control and capability simultaneously. We also provide a control chart constant to construct the process capability index-based control chart. A numerical example is presented to demonstrate the application of the proposed chart, and the effect of non-normality is discussed. The result shows that the proposed control chart performs better in monitoring and assessing processes, and eliminates the usual two-stage procedure reflected in the literature.