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Original Articles

Evaluation of Measurement Systems with a Small Number of Observers

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Pages 323-331 | Published online: 16 Aug 2006
 

Abstract

The standard R&R study for evaluation of measurement systems assumes that participating observers constitute a random sample. Often there are only a few observers, all of them included in the study. An alternative measure for the gauge R&R is proposed for this situation, and it is shown that this may improve the perception of the quality of the measurement system markedly, especially with only a few observers. Finally it is shown that a simple estimator can be used, with a bias limited to just a few percent.

ACKNOWLEDGMENTS

The authors would like to thank Gert ten Brink and Bert Dol from Philips Semiconductors Stadskanaal, for their measurements.

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