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Morgan GERMA: Collaborator at Joseph Fourier University, Grenoble, Master CQAQMV
INTRODUCTION
The accuracy of a measurement method is all the better when we have a true value for the quantity being measured. But what is true value? Is it not a holy grail, a mythical notion that is the object of a scientific quest that brings together lab assistants around a bench?
Although this true value is not known with certainty, it is possible to have an accepted reference value, by means of :
reference materials ;
preparation of a known sample ;
a reference measurement method of recognized accuracy ;
interlaboratory tests.
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Bibliography
ISO 3534-1 Statistics – Vocabulary and symbols – Part 1: General statistical terms and terms used in probability calculations
JCGM 200: 2012 international vocabulary of metrology – Fundamental and general concepts and associated terms (VIM)
ISO 5725-1 accuracy and precision-principles
E. Morice, Puissance...
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