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An alternative method to test for randomness of a process
Author(s) -
Holmes Donald S.,
Mergen A. Erhan
Publication year - 1995
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.4680110306
Subject(s) - randomness , variance (accounting) , statistics , mathematics , process (computing) , statistical process control , computer science , accounting , business , operating system
Abstract The objective of this paper is to revisit an old technique for testing the randomness of a process. This method uses the mean square successive difference approach to estimate variance, compares this estimate with the usual variance estimate, and tests whether the two variance estimates are significantly different. If the test result is significant, it is concluded that the process is not random (i.e. not in control). The non‐random results are addressed to accomplish quality improvement.