Accreditation and Quality Assurance

, Volume 10, Issue 12, pp 664–671

A new terminology for the approaches to the quantification of the measurement uncertainty

  • Ricardo J. N. B. da Silva
  • Júlia R. Santos
  • M. F. G. F. C. Camões
General Paper

Abstract

A new terminology for the approaches to the quantification of the measurement uncertainty is presented, with a view to a better understanding of the available methodologies for the estimation of the measurement quality and differences among them. The knowledge of the merits, disadvantages and differences in the estimation process, of the available approaches, is essential for the production of metrologically correct and fit-to-purpose uncertainty estimations. The presented terminology is based on the level of the analytical information used to estimate the measurement uncertainty (e.g., supralaboratory or intralaboratory information), instead of the direction of information flow (“bottom-up” or “top-down”) towards the level of information where the test is performed, avoiding the use of the same designation for significantly different approaches. The proposed terminology is applied to the approaches considered on 19 examples of the quantification of the measurement uncertainty presented at the Eurachem/CITAC CG4 Guide, Eurolab Technical Report 1/2002 and Nordtest Technical Report 537. Additionally, differences of magnitude in the measurement uncertainty estimated by various approaches are discussed.

Keywords

Uncertainty Terminology Metrology Quality 

References

  1. 1.
    ISO (1999) General requirements for the competence of testing and calibration laboratories, ISO/IEC 10725, Geneva, SwitzerlandGoogle Scholar
  2. 2.
    Eurachem, CITAC (2000) Quantifying uncertainty in analytical measurement, 2nd edn. Available via www.eurachem.ul.ptGoogle Scholar
  3. 3.
    Eurolab (2002) Measurement Uncertainty in testing—A short introduction on how to characterise accuracy and reliability of results including a list of useful references. Technical Report No. 1/2002, GermanyGoogle Scholar
  4. 4.
    Nordtest (2004) Handbook for the calculation of measurement uncertainty in environmental laboratories, 2nd edn. Available via www.nordtest.orgGoogle Scholar
  5. 5.
    ISO (1995) Guide to the expression of uncertainty in measurement, Geneva, SwitzerlandGoogle Scholar
  6. 6.
    ISO (1993) International vocabulary of basic and general terms in metrology, Geneva, SwitzerlandGoogle Scholar
  7. 7.
    Analytical Methods Committee (1999) Analyst 120:2303Google Scholar
  8. 8.
    ISO (2004) Guidance for the use of repeatability, reproducibility and trueness estimates in measurement uncertainty estimation, ISO/TS 21748:2004, Geneva, SwitzerlandGoogle Scholar
  9. 9.
    Ellison SLR, Barwick VJ (1998) Accred Qual Assur 3:101CrossRefGoogle Scholar
  10. 10.
    Ellison SLR, Barwick VJ (1998) Analyst 123:1387CrossRefGoogle Scholar
  11. 11.
    Maroto A, Riu J, Boqué R, Rius FV (1999) Anal Chim Acta 391:173CrossRefGoogle Scholar
  12. 12.
    Jülicher B, Gowik P, Uhlig S (1999) Analyst 124:537CrossRefGoogle Scholar
  13. 13.
    Silva RJNB, Lino MJ, Santos JR, Camões MFGFC (2000) Analyst 125:1459CrossRefPubMedGoogle Scholar
  14. 14.
    Silva RJNB, Figueiredo H, Santos JR, Camões MFGFC (2003) Anal Chim Acta 477:169CrossRefGoogle Scholar
  15. 15.
    IUPAC, ISO, AOAC International, Eurachem (2000) Harmonised guidelines for the use of recovery information in analytical measurement. Available via www.eurachem.ul.ptGoogle Scholar
  16. 16.
    ISO (1994) Accuracy (trueness and precision) of measurement method and results—Part 3—Intermediate measures of the precision of a standard measurement method, ISO 5725-3:1994, Geneva, SwitzerlandGoogle Scholar
  17. 17.
    ASTM (1989) Standard guide for conducting ruggedness tests, ASTM E 1169-89Google Scholar

Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • Ricardo J. N. B. da Silva
    • 1
  • Júlia R. Santos
    • 1
  • M. F. G. F. C. Camões
    • 2
  1. 1.Direcção-Geral de Protecção das CulturasQuinta do MarquêsOeirasPortugal
  2. 2.CECUL/DQB – Faculdade de Ciências da Universidade de LisboaLisboaPortugal

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