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Accuracy

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CIRP Encyclopedia of Production Engineering

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Synonyms

Accuracy of measurement; Measurement accuracy

Definition

Closeness of agreement between a measured quantity value and a true quantity value of a measurand.

  • NOTE 1 The concept “measurement accuracy” is not a quantity and is not given a numerical quantity value. A measurement is said to be more accurate when it offers a smaller measurement error.

  • NOTE 2 The term “measurement accuracy” should not be used for measurement trueness, and the term “measurement precision” should not be used for “measurement accuracy,” which, however, is related to both these concepts.

  • NOTE 3 “Measurement accuracy” is sometimes understood as closeness of agreement between measured quantity values that are being attributed to the measurand.

(ISO 99:2007, definition 2.13)

Theory and Application

Let us start with definition of (ISO 99:2007), the International Vocabulary of Metrology (VIM), see “Definition.”

From this definition, we have to conclude that the term “accuracy” should be used just for general...

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References

  • ISO 10360 (2000–2013) Geometrical product specifications (GPS): acceptance and reverification tests for coordinate measuring machines (CMM), part 1–7. ISO, Geneva

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  • ISO 230-2:2014 Test code for machine tools – Part 2: Determination of accuracy and repeatability of positioning numerically controlled axes. ISO, Geneva

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  • ISO 5725 (1994–2005) Accuracy (trueness and precision) of measurement methods and results, part 1–6. ISO, Geneva

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  • ISO/IEC Guide 99:2007 International vocabulary of metrology: Basic and general concepts and associated terms (VIM). ISO, Geneva

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Author information

Authors and Affiliations

  1. IWF, ETH Zurich, Geerenweg 2c, 8226, Schleitheim, Switzerland

    Wolfgang Knapp

Authors
  1. Wolfgang Knapp
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Corresponding author

Correspondence to Wolfgang Knapp .

Editor information

Editors and Affiliations

  1. CIRP Office Intern. Institution for, Paris, France

    The International Academy for Produ

  2. Université du Québec à Trois-Rivières, Mechanical Engineering Department, Trois-Rivieres, Québec, Canada

    Luc Laperrière

  3. Technische Universität München, Garching, Germany

    Gunther Reinhart

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© 2016 CIRP

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Knapp, W. (2016). Accuracy. In: The International Academy for Produ, Laperrière, L., Reinhart, G. (eds) CIRP Encyclopedia of Production Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35950-7_6575-4

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  • DOI: https://doi.org/10.1007/978-3-642-35950-7_6575-4

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Online ISBN: 978-3-642-35950-7

  • eBook Packages: Springer Reference EngineeringReference Module Computer Science and Engineering

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