PROCESS CAPABILITY INDEX-BASED CONTROL CHART FOR VARIABLES
Keywords:Downton's statistics, Process capability index, Control chart
This paper proposes a process capability index-based control chart for variables using the Downton estimator with a specified Cp value. 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.
How to Cite
Adeoti, O. A., & Olaomi, J. O. (2017). PROCESS CAPABILITY INDEX-BASED CONTROL CHART FOR VARIABLES. The South African Journal of Industrial Engineering, 28(2), 28–36. https://doi.org/10.7166/28-2-1353
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