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A New Control Technique with Quality Characteristic Shifting with Time
Author(s) -
Mao Hong,
Cheng Smiley W.
Publication year - 2016
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.1895
Subject(s) - ewma chart , control chart , interval (graph theory) , chart , statistical process control , extension (predicate logic) , control (management) , quality (philosophy) , computer science , process (computing) , shewhart individuals control chart , control limits , production (economics) , reliability engineering , statistics , engineering , mathematics , artificial intelligence , philosophy , epistemology , combinatorics , economics , macroeconomics , programming language , operating system
In this paper, a new quality control technique is discussed, in which the quality characteristic shifts with time. A trends semi‐circle control chart is proposed to control this type of processes effectively. An optimization model is suggested to determine the optimal interval of adjustment. We also discuss the average run length of the proposed control chart and the extension to the EWMA chart. An example is used to illustrate its application in a production process. Copyright © 2015 John Wiley & Sons, Ltd.