NF ISO 5725-1

NF ISO 5725-1

December 1994
Standard Cancelled

Application of statistics. Accuracy (trueness and precision) of measurement methods and results. Part 1 : general principles and definitions.

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Main informations

Collections

National standards and national normative documents

Publication date

December 1994

Number of pages

24 p.

Reference

NF ISO 5725-1

ICS Codes

03.120.30   Application of statistical methods
17.020   Metrology and measurement in general

Classification index

X06-041-1

Print number

1 - 02/05/2006

International kinship

ISO 5725-1:1994
Replaced standards (1)
NF ISO 5725
December 1987
Standard Cancelled
Application of statistical. Precision of test methods. Determination of repeatability and reproducibility for A standard test method by inter-laboratory tests.

La présente norme donne les définitions pratiques de la répétabilité r et de la reproductibilité R qui se prêtent à une détermination numérique par essai. Elle présente les implications de ces définitions de r et de R. Elle établit des principes de base pour l'agencement, l'organisation et l'analyse des essais prévus pour la détermination de r et de R.

Standard replaced by (1)
NF ISO 5725-1
August 2023
Standard Current
Accuracy (trueness and precision) of measurement methods and results - Part 1: General principles and definitions

<p class="p2"><span lang="EN-GB">This document</span></p> <p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';">     </span></span></span><!--[endif]--><span lang="EN-GB">introduces conditions, constraints and resources necessary to evaluate a measurement method or a result;</span></p> <p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';">     </span></span></span><!--[endif]--><span lang="EN-GB">defines an organizational scheme for the acquisition of trueness and precision data by study;</span></p> <p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';">     </span></span></span><!--[endif]--><span lang="EN-GB">provides the necessary definitions, statistical model and principles for ISO 5725 (all parts).</span></p> <p class="ListContinue1" style="mso-list: l0 level1 lfo1;"><!-- [if !supportLists]--><span lang="EN-GB" style="mso-fareast-font-family: Cambria; mso-bidi-font-family: Cambria;"><span style="mso-list: Ignore;">—<span style="font: 7.0pt 'Times New Roman';">     </span></span></span><!--[endif]--><span lang="EN-GB">is not applicable to proficiency testing or production of the reference item that has their own standards (ISO 13528, respectively and ISO Guide 35).</span></p> <p class="p2"><span lang="EN-GB">This document is concerned exclusively with measurement methods which yield results on a continuous scale and give a single value as the test result, although this single value may be the outcome of a calculation from a set of observations.</span></p> <p class="MsoBodyText"><span lang="EN-GB">It defines values which describe, in quantitative terms, the ability of a measurement method to give a true result (trueness) or to replicate a given result (precision). Thus, there is an implication that exactly the identical item is being measured, in exactly the same way, and that the measurement process is under control.</span></p> <p class="MsoBodyText"><span lang="EN-GB">This document may be applied to a very wide range of test items, including gas, liquids, powders and solid objects, manufactured or naturally occurring, provided that due consideration is given to any heterogeneity of the test item.</span></p> <p class="MsoBodyText"><span lang="EN-GB">This document does not include methods of calculation that are described in the other parts.</span></p>

Table of contents
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  • 1
    Domaine d'application 1
  • 2
    Références normatives 1
  • 3
    Définitions 2
  • 4
    Conséquences pratiques des définitions pour les expériences d'exactitude 4
  • 4.1
    Méthode de mesure normalisée 4
  • 4.2
    Expérience d'exactitude 5
  • 4.3
    Individus d'essai identiques 5
  • 4.4
    Courts intervalles de temps 5
  • 4.5
    Laboratoires participants 5
  • 4.6
    Conditions d'observation 6
  • 5
    Modèle statistique 6
  • 5.1
    Modèle de base 6
  • 5.2
    Relation entre le modèle de base et la fidélité 7
  • 5.3
    Modèles alternatifs 7
  • 6
    Considérations sur la planification de l'expérience lors de l'estimation de l'exactitude 8
  • 6.1
    Organisation d'une expérience d'exactitude 8
  • 6.2
    Méthode de mesure normalisée 8
  • 6.3
    Sélection des laboratoires pour l'expérience d'exactitude 8
  • 6.4
    Sélection des matériaux à utiliser pour une expérience d'exactitude 11
  • 7
    Utilisation des données d'exactitude 12
  • 7.1
    Publication des valeurs de justesse et de fidélité 12
  • 7.2
    Applications pratiques des valeurs de justesse et de fidélité 13
  • Annexes
  • A
    Symboles et abréviations utilisés dans l'ISO 5725 14
  • B
    Graphiques pour les incertitudes dans les mesures de fidélité 16
  • C
    Bibliographie 18
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