A COMPARISON OF SOME ROBUST BIVARIATE CONTROL CHARTS FOR INDIVIDUAL OBSERVATIONS

This paper proposed and considered some bivariate control charts to monitor individual observations from a statistical process control. Usual control charts which use mean and variance-covariance estimators are sensitive to outliers. We consider the following robust alternatives to the classical Hot...

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Bibliographic Details
Published in:	International Journal for Quality Research Vol. 8; no. 2; pp. 183 - 196
Main Authors:	Moustafa Omar Ahmed Abu - Shawiesh, Florence George, Golam B. M. Kibria
Format:	Journal Article
Language:	English
Published:	Center for Quality, Faculty of Engineering, University of Kragujevac, Serbia 01-01-2014
Subjects:	Bivariate control chart False Alarm Hotelling's T2 statistic Outliers Robust estimation Simulation Study Statistical process control
Online Access:	Get full text
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Summary:	This paper proposed and considered some bivariate control charts to monitor individual observations from a statistical process control. Usual control charts which use mean and variance-covariance estimators are sensitive to outliers. We consider the following robust alternatives to the classical Hoteling's T2: T2MedMAD, T2MCD, T2MVE a simulation study has been conducted to compare the performance of these control charts. Two real life data are analyzed to illustrate the application of these robust alternatives.
ISSN:	1800-6450 1800-7473