Evaluation of Measurement Systems with a Small Number of Observers

Edwin R. van den Heuvel, Albert Trip

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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.
Original languageEnglish
Pages (from-to)323–331
Number of pages9
JournalQuality Engineering
Issue number2
Publication statusPublished - Mar-2002


  • Random effects models
  • Prediction intervals
  • Mixed effects models
  • Gauge R&R study
  • Analysis of variance

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