NF ISO/IEC GUIDE 98-3
Uncertainly of measurement - Part 3 : guide to the expression of uncertainly in measurement (GUM : 1995)
ISO/IEC Guide 98-3:2008 is a reissue of the 1995 version of the Guide to the Expression of Uncertainty in Measurement (GUM), with minor corrections. This Guide establishes general rules for evaluating and expressing uncertainty in measurement that can be followed at various levels of accuracy and in many fields — from the shop floor to fundamental research. The principles of this Guide are intended to be applicable to a broad spectrum of measurements, including those required for: maintaining quality control and quality assurance in production;complying with and enforcing laws and regulations;conducting basic research, and applied research and development, in science and engineering;calibrating standards and instruments and performing tests throughout a national measurement system in order to achieve traceability to national standards;developing, maintaining, and comparing international and national physical reference standards, including reference materials.
ISO/IEC Guide 98-3:2008 is a reissue of the 1995 version of the Guide to the Expression of Uncertainty in Measurement (GUM), with minor corrections. This Guide establishes general rules for evaluating and expressing uncertainty in measurement that can be followed at various levels of accuracy and in many fields — from the shop floor to fundamental research. The principles of this Guide are intended to be applicable to a broad spectrum of measurements, including those required for:
- maintaining quality control and quality assurance in production;
- complying with and enforcing laws and regulations;
- conducting basic research, and applied research and development, in science and engineering;
- calibrating standards and instruments and performing tests throughout a national measurement system in order to achieve traceability to national standards;
- developing, maintaining, and comparing international and national physical reference standards, including reference materials.
Le présent document constitue un guide pour tous ceux qui sont concernés par la mesure. Il contribue à une information complète sur la manière dont on aboutit à l'expression de l'incertitude de mesure ; il fournit une base pour la comparaison des résultats de mesure.
- Avant-propos
-
1 Domaine d'application
-
2 Définitions
-
3 Concepts fondamentaux
-
4 Évaluation de l'incertitude-type
-
5 Détermination de l'incertitude-type composée
-
6 Détermination de l'incertitude élargie
-
7 Expression de l'incertitude
-
8 Récapitulation de la procédure d'évaluation et d'expression de l'incertitude
- Annexe A Recommandations du Groupe de travail et du CIPM
- Annexe Annexe B Termes métrologiques généraux
- Annexe C Termes et concepts statistiques fondamentaux
- Annexe D Valeur "vraie", erreur et incertitude
- Annexe E Motivation et fondements de la Recommandation INC-1 (1980)
- Annexe F Conseils pratiques pour l'évaluation des composantes de l'incertitude
- Annexe G Degrés de liberté et niveaux de confiance
- Annexe H Exemples
- Annexe J * Liste des principaux symboles
- Bibliographie
The Requirements department helps you quickly locate within the normative text:
- mandatory clauses to satisfy,
- non-essential but useful clauses to know, such as permissions and recommendations.
The identification of these types of clauses is based on the document “ISO / IEC Directives, Part 2 - Principles and rules of structure and drafting of ISO documents ”as well as on a constantly enriched list of verbal forms.
With Requirements, quickly access the main part of the normative text!

COBAZ is the simple and effective solution to meet the normative needs related to your activity, in France and abroad.
Available by subscription, CObaz is THE modular solution to compose according to your needs today and tomorrow. Quickly discover CObaz!
Request your free, no-obligation live demo
I discover COBAZ