Author

Jiakang Chen

Publication Date

1995

Document Type

Dissertation/Thesis

First Advisor

Marcellus, Richard L.

Degree Name

M.S. (Master of Science)

Department

Department of Industrial Engineering

LCSH

Production control--Charts, diagrams, etc||Quality control--Charts, diagrams, etc

Abstract

This study designs an exponentially weighted moving average residual (EWMAR) chart for autocorrelated processes. The first order autoregressive (AR(1)) process and the first order moving average (MA(1)) process are examined. The performance of the EWMAR chart is compared with that of Alwan's Shewhart residual (ASRC) chart and that of the exponentially weighted moving average (EWMA) chart based on the average run length. A cost model of the EWMAR chart is derived and a numerical analysis is performed based on this model. The results show that when autocorrelation is present, using the EWMAR chart can improve quality control performance. The EWMAR chart outperforms the ASRC chart for a small shift in the process mean and does not lose much for a large shift in the process mean. The EWMAR chart outperforms the EWMA chart for an AR(1) process.

Comments

Includes bibliographical references (pages [52]-53)

Extent

v, 81 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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