5. Our advice
5.1 Use your critical thinking skills
When using ISO 5725-6 acceptability flowcharts, carry out a root cause analysis as soon as a potentially aberrant result appears, before continuing with the decision tree.
When choosing the number of groups in an R&R study, or when deciding to exclude a group in a consistency test, you can use the rule proposed by ISO 5725-3. Considering "t" groups with "n" replicates, it is recommended that the t value ( n -1), be at least 15.
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Bibliography
ISO 5725-1: 1994 Accuracy (trueness and precision) of measurement results and methods – Part 1: General principles and definitions (in the process of being replaced at the time of writing).
ISO 5725-2: 2019 Accuracy (trueness and precision) of measurement results and methods – Part 2: Basic method for determining the repeatability and reproducibility of a standardized...
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