Precision of test methods : determination of repeatability and reproducibility by inter-laboratory tests : application in development and assessment of dairy methodology

Abstract

The International Standard ISO 5725 is sometimes considered to be too extended for practical use in the development and assessment of dairy methodology. Therefore the Joint IDF/ISO/AOAC Group of Experts E 30 Statistics of analytical data - decided upon a simplified description, based on ISO 5725, to he more easily applied by dairy scientists. This report comprises an abstract from ISO 5725 intended as a practical guideline in computing repeatability (r) and reproducibility (R). The computation in this report is identical to that of ISO 5725. Theoretical considerations and further instructions in ISO 5725 are dropped here. However, all items discussed in ISO 5725 are succinctly mentioned in this report, so that those who are interested can consult the original standard.

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