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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
decision sciences
A change point method for linear profile data
Quality and Reliability Engineering International, Volume 23, No. 2, Year 2007
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Description
We propose a change point approach based on the segmented regression technique for testing the constancy of the regression parameters in a linear profile data set. Each sample collected over time in the historical data set consists of several bivariate observations for which a simple linear regression model is appropriate. The change point approach is based on the likelihood ratio test for a change in one or more regression parameters. We compare the performance of this method to that of the most effective Phase I linear profile control chart approaches using a simulation study. The advantages of the change point method over the existing methods are greatly improved detection of sustained step changes in the process parameters and improved diagnostic tools to determine the sources of profile variation and the location(s) of the change point(s). Also, we give an approximation for appropriate thresholds for the test statistic. The use of the change point method is demonstrated using a data set from a calibration application at the National Aeronautics and Space Administration (NASA) Langley Research Center. Copyright © 2006 John Wiley & Sons, Ltd.
Authors & Co-Authors
Mahmoud, Mahmoud A.
Egypt, Giza
Cairo University
Egypt, Giza
Faculty of Economics and Political Science
Parker, Peter A.
United States, Hampton
Nasa Langley Research Center
Woodall, William H.
United States, Blacksburg
Virginia Polytechnic Institute and State University
Hawkins, Douglas M.
United States, Minneapolis
University of Minnesota Twin Cities
Statistics
Citations: 322
Authors: 4
Affiliations: 5
Identifiers
Doi:
10.1002/qre.788
ISSN:
07488017
e-ISSN:
10991638