3. Tolerances and measurement uncertainty: which rule to choose?
The rule to be adopted must take into account the context of the measurement:
process control (should we regulate?) ;
acceptance/rejection of product batches (declaration of conformity) ;
analysis results (sick/not sick, context similar to batch acceptance).
Measurement and its uncertainties are also present in the R&D phase. In these cases, we need to analyze the consequences for research conclusions on a case-by-case basis. Indeed, as Georges Charpak stated in his book Devenez sorciers, devenez savants: "(...) It should be remembered that the uncertainty surrounding a piece of data is just as important as the data itself, since it determines the reliability that can be attributed...
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Tolerances and measurement uncertainty: which rule to choose?
What can we conclude?
Bibliography
"Les liaisons dangereuses : Tout ce qu'il faut savoir avant d'appliquer la nouvelle norme ISO/IEC Guide 98-4", Jean-Michel POU, Contrôles Essais Mesures, February 2013 ( cf. section Sites internet).
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