Choice of parameters for an R&R study and its impact on the measurement capability

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^* Corresponding author: cdubois@deltamu.com ; pcourtois@deltamu.com

Abstract

When you perform a traditional R&R (Repeatability and Reproducibility), the first practical question that comes to mind is “How many times “n” do we repeat the measurements, and how many operators “p” should we consider?”. As the quality of the standard deviations obtained during this study depends on the parameters n and p, a large number of measurements is required. This is obviously not possible due to environment, time and cost aspects. The question is then, how to optimise the parameters “n” and “p”, for an R&R study? To answer this question, statistics are useful tools, which, combined with your practical skills, will help you to understand the outcome of the study and rationalise your choice.