ISO/IEC Guide 98-1:2024
(Main)Guide to the expression of uncertainty in measurement — Part 1: Introduction
Guide to the expression of uncertainty in measurement — Part 1: Introduction
This document establishes general rules for evaluating and expressing uncertainty in measurement from the shop floor to fundamental research. Therefore, the principles of this suite of documents are intended to be applicable to a broad spectrum of measurements and their applications. An overview of the parts of the GUM is given in table A.1 in Annex A. NOTE Where the acronym GUM is used in this document, it refers to the suite of documents. An individual part of the GUM is referred to by its corresponding JCGM numbering (e.g., part 6 of the GUM is JCGM GUM-6:2020). This document gives a rationale for evaluating, expressing and using measurement uncertainty (Clause 2). A brief introduction is given to measurement (Clause 3) and to the decisions involved when evaluating measurement uncertainty (Clause 4). In Clause 5, a brief description of the contents of the parts of the GUM is given. In each of these clauses, the relevant parts of the GUM are identified for further guidance.
Guide pour l'expression de l'incertitude de mesure — Partie 1: Introduction
Ce document établit les règles générales pour l’évaluation et l’expression de l’incertitude de mesure pour les mesurages, de la boutique du commerçant à la recherche fondamentale. C’est pourquoi les principes de cette série de documents sont prévus pour s’appliquer à un large spectre de mesurages et à leurs applications. Un aperçu des parties du GUM est fourni dans le Tableau A.1 dans l’Annexe A. NOTE Lorsque l’acronyme GUM est employé dans le présent document, il fait référence à la série de documents. Une partie individuelle du GUM est désignée par son numéro JCGM correspondant (par exemple, la Partie 6 du GUM est désignée JCGM GUM-6:2020). Le présent document fournit une justification pour l’évaluation, l’expression et l’utilisation de l’incertitude de mesure (Article 2). Il présente une brève introduction concernant le mesurage (Article 3) et les décisions induites lors de l’évaluation de l’incertitude de mesure (Article 4). L’Article 5 fournit une brève description du contenu des parties du GUM. Dans chacun de ces articles, les parties pertinentes du GUM sont identifiées pour donner des lignes directrices supplémentaires.
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Standards Content (Sample)
Guide 98-1
Second edition
Guide to the expression of
2024-02
uncertainty in measurement —
Part 1:
Introduction
Guide pour l'expression de l'incertitude de mesure —
Partie 1: Introduction
Reference number
ISO/IEC Guide 98-1:2024(en) © ISO/IEC 2024
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ISO/IEC Guide 98-1:2024(en)
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ISO/IEC Guide 98-1:2024(en)
ISO/IEC Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are members
of ISO or IEC participate in the development of International Standards through technical committees
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technical committees collaborate in fields of mutual interest. Other international organizations, governmental
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The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of
document should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC
Directives, Part 2 (see www.iso.org/directives or www.iec.ch/members_experts/refdocs).
ISO and IEC draw attention to the possibility that the implementation of this document may involve the use of
(a) patent(s). ISO and IEC take no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO and IEC had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent database
available at www.iso.org/patents and https://patents.iec.ch. ISO and IEC shall not be held responsible for
identifying any or all such patent rights.
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constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www.iso.org/iso/foreword.html.
In the IEC, see www.iec.ch/understanding-standards.
This document was prepared by Working Group 1 of the Joint Committee for Guides in Metrology (as JCGM
GUM-1:2023) and was adopted by the national bodies of ISO and IEC.
This second edition cancels and replaces the first edition (ISO/IEC Guide 98-1:2009), which has been
technically revised.
The main changes are as follows:
— the document has been redrafted as an introduction to the revised ISO/IEC Guide 98 series;
— most conceptual and technical aspects have been removed.
A list of all parts in the ISO/IEC Guide 98 series can be found on the ISO and IEC websites.
Given that this document is identical in content to JCGM GUM-1:2023, the decimal symbol is a point on the
line.
Annex ZZ has been appended to provide a list of corresponding ISO/IEC Guides and JCGM guidance documents
for which equivalents are not given in the text.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html and www.iec.ch/national-
committees.
© ISO/IEC 2024 – All rights reserved
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ISO/IEC Guide 98-1:2024(en)
Joint Committee for Guides in Metrology
Guide to the expression of uncertainty in measurement
— Part 1: Introduction
Guide pour l’expression de l’incertitude de mesure — Partie 1:
Introduction
JCGM GUM-1:2023
© JCGM 2023 – All rights reserved
© ISO/IEC 2024 – All rights reserved
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ISO/IEC Guide 98-1:2024(en)
ii JCGM GUM-1:2023
© JCGM 2023
Copyright of this JCGM guidance document is
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