A COMPARISON OF SOME ROBUST BIVARIATE CONTROL CHARTS FOR INDIVIDUAL OBSERVATIONS

oleh: Moustafa Omar Ahmed Abu - Shawiesh, Florence George, Golam B. M. Kibria

Format: Article
Diterbitkan: Center for Quality, Faculty of Engineering, University of Kragujevac, Serbia 2014-06-01

Deskripsi

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.