Tolerances and measurement uncertainty: which rule to choose?
Define measurement and precision requirements
Practical sheet REF: FIC1298 V1
Tolerances and measurement uncertainty: which rule to choose?
Define measurement and precision requirements

Author : Jean-Michel POU

Publication date: November 10, 2014, Review date: November 27, 2016 | Lire en français

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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).

Please note

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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