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Change Point Estimation Methods for Control Chart Postsignal Diagnostics: A Literature Review
Author(s) -
Amiri Amirhossein,
Allahyari Saeed
Publication year - 2012
Publication title -
quality and reliability engineering international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 62
eISSN - 1099-1638
pISSN - 0748-8017
DOI - 10.1002/qre.1266
Subject(s) - control chart , shewhart individuals control chart , computer science , chart , estimation , statistics , reliability engineering , ewma chart , engineering , mathematics , systems engineering , process (computing) , operating system
Control charts are the most popular monitoring tools used to distinguish between special (assignable) and common causes of variation and to detect any changes in processes. The time that a control chart gives an out‐of‐control signal is not the real time of change. The actual time of the change is called the change point. Knowing the real time of the change will help and simplify finding the assignable causes of the signal, which may be the result of a shift in the process mean or change in process variability. This article gives an overview of change point estimation in control charts, provides a classification scheme, and describes the research that has previously appeared in the literature. In addition, a gap analysis in this area provides direction for future research. Copyright © 2011 John Wiley & Sons, Ltd.