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Robust individual control chart for change point model


Ng, Kooi Huat and Midi, Habshah (2010) Robust individual control chart for change point model. WSEAS Transactions on Mathematics, 9 (7). pp. 499-508. ISSN 1109-2769


Control charts are used to monitor for changes in a process by distinguishing between common and special causes of variability. When a control chart signals, process engineers must initiate a search for the special cause of the process disturbance. Identifying which combination of the many process variables is responsible for a change in the process allows engineers to improve quality by preventing or avoiding changes in those variables which lead to poor quality. We examine a process-monitoring tool that not only provides speedy detection regardless of the magnitude of the process shift, but also provides useful change point statistics. Robustness against assignable causes of variation appears to be important and a likelihood ratio method is used to develop test statistics for step change shifts.The performance of the proposed methodology is demonstrated with numerical example and simulation studies.

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Additional Metadata

Item Type: Article
Subject: Process control — Statistical methods
Subject: Outliers
Subject: Mathematical statistics
Divisions: Faculty of Science
Publisher: World Scientific and Engineering Academy and Society
Keywords: Change Point Estimation; Statistical Process Control; In-Control; Out-of-Control; Outlier; Maximum-Type
Depositing User: Najwani Amir Sariffudin
Date Deposited: 29 Jan 2013 05:03
Last Modified: 16 Dec 2015 08:28
URI: http://psasir.upm.edu.my/id/eprint/16590
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