Title: Critique of the AIAG cross-tabulation procedure for attribute gauge R&R study

Authors: Emese Vago, Sandor Kemeny

Addresses: Department of Chemical and Environmental Process Engineering, Budapest University of Technology and Economics, H-1521 Muegyetem rkp. 1-3, Budapest, Hungary. ' Department of Chemical and Environmental Process Engineering, Budapest University of Technology and Economics, H-1521 Muegyetem rkp. 1-3, Budapest, Hungary

Abstract: The Automotive Industry Action Group|s manual for attribute measurement system analysis has two major deficiencies: 1) the improper use of cross-tabulation and Cohen|s kappa when operators are compared in case of repeated ratings, and; 2) calculation of the probabilities of wrong decisions with the Bayes theorem, however the conditions of its application are not fulfilled. Besides the AIAG manual we reviewed the approaches to attribute measurement system analysis proposed in the literature and used by some of the most popular statistical software. The conclusion is that all the methods referred to are statistically flawed. They do not properly consider the multiple ratings. The need has arisen for a different approach.

Keywords: attribute measurement; Bayes; kappa; repeatability; reproducibility; Automotive Industry Action Group; AIAG manual; R&R; cross-tabulation; multiple ratings.

DOI: 10.1504/IJQET.2011.038724

International Journal of Quality Engineering and Technology, 2011 Vol.2 No.1, pp.75 - 93

Published online: 24 Feb 2011 *

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