PROCESS CAPABILITY INDEX-BASED CONTROL CHART FOR VARIABLES

Authors

  • Olatunde Adebayo Adeoti University of South Africa Department of Statistics and Bowen University, Iwo, Nigeria Department of Mathematics and Statistics
  • John Olutunji Olaomi University of South Africa

DOI:

https://doi.org/10.7166/28-2-1353

Keywords:

Downton's statistics, Process capability index, Control chart

Abstract

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.

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Author Biographies

Olatunde Adebayo Adeoti, University of South Africa Department of Statistics and Bowen University, Iwo, Nigeria Department of Mathematics and Statistics

Department of Statistics

John Olutunji Olaomi, University of South Africa

Department of Statistics

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Published

2017-09-04

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

Issue

Vol. 28 No. 2 (2017)

Section

General Articles

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