ISO 5725 and GUM: comparison and comments

We compare the approach to measure uncertainties proposed in ISO 5725 and GUM from a statistician point of view. In particular we give some warnings to the application of the expanded uncertainty introduced in GUM when the input variables are few and we report some considerations on the relevant rol...

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Bibliographic Details
Published in:Accreditation and quality assurance 2009-03, Vol.14 (3), p.159-166
Main Authors: Deldossi, Laura, Zappa, Diego
Format: Article
Language:English
Subjects:
Accuracy
Analytical Chemistry
Approximation
Biochemistry
Chemistry
Chemistry and Materials Science
Collaboration
Commercial Law
Discussion Forum
Ecotoxicology
Food Science
Marketing
Methods
Random variables
Reproducibility
Testing laboratories
Uncertainty
Variance analysis
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Description
Summary:We compare the approach to measure uncertainties proposed in ISO 5725 and GUM from a statistician point of view. In particular we give some warnings to the application of the expanded uncertainty introduced in GUM when the input variables are few and we report some considerations on the relevant role of the interactions among the input variables in the measurement equation as well as the role of statistical design of experiments to measure uncertainties.
ISSN:0949-1775
1432-0517
DOI:10.1007/s00769-008-0478-3