GINI MEAN DIFFERENCE AND EWMA CHARTS

by Muhammad Riaz and Saddam Akbar Abbasi.

Abstract: : For an improved monitoring of process parameters, an EWMA control charting scheme is proposed. The proposal introduces Gini mean difference based EWMA control scheme for location and scale parameters using asymptotic limits. The comparison of the proposed schemes are made with the EWMA control schemes based on sample range R, sample standard deviation S and Downton’s estimator used by Khoo (2004).

Key Words: Control Charts; Downton’s estimator; EWMA; Gini mean difference; location and scale parameters; Normality; Outliers

Authors:
Muhammad Riaz, riaz76qau@yahoo.com
Saddam Akbar Abbasi, saddamabbasi@yahoo.com

Editor: Xie, M., XIE_MIN@NUS.EDU.SG

READING THE ARTICLE: You can read the article in portable document (.pdf) format (299399 bytes.)

NOTE: The content of this article is the intellectual property of the authors, who retains all rights to future publication.

This page has been accessed 2753 times since December 8, 2007.


Return to the InterStat Home Page.