Journal
MEASUREMENT
Volume 46, Issue 8, Pages 2514-2518Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.measurement.2013.04.065
Keywords
Gage repeatability and reproducibility; Measurement systems analysis; Number of distinct categories
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Measurement systems analysis has been widely used in many industries, especially those related to the automotive sector as part of statistical process control practices. Over the years, new elements have been added to the initial requirements for system acceptance, centered on the values of repeatability and reproducibility (integrated in indexes as GRR and GRR%). One of these elements, the number of distinct data categories (NDC) has been treated as an independent requirement. In this paper, we show that NDC and GRR are not independent and that they are in fact both linked by an exact relationship. This therefore makes the double requirement redundant, confusing and unnecessary, except maybe to enhance some conceptual questions. (c) 2013 Elsevier Ltd. All rights reserved.
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