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Basic Process Capability Indices: An Expository Review
Author(s) -
Anis Mohammed Z.
Publication year - 2008
Publication title -
international statistical review
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.051
H-Index - 54
eISSN - 1751-5823
pISSN - 0306-7734
DOI - 10.1111/j.1751-5823.2008.00060.x
Subject(s) - process capability , process (computing) , statistics , relation (database) , autocorrelation , process capability index , sample (material) , computer science , econometrics , index (typography) , mathematics , data mining , reliability engineering , work in process , engineering , operations management , chemistry , chromatography , operating system , world wide web
Summary A review of the four basic process capability indices has been made. The interrelationship among these indices has been highlighted. Attention has been drawn to their drawbacks. The relation of these indices to the proportion nonconforming has been dwelt upon and the requirement of the adequate sample size has been emphasized. Cautionary remarks on the use of these indices in the case of nonnormal distributions, skewed distributions, and autocorrelated data are also presented. The effect of measurement error on process capability indices has been dealt with in great detail.