GUIDE 98-6 First edition 2021-02 Uncertainty of measurement - Part 6: Developing and using measurement models Incertitude de mesure - Partie 6: Elaboration et utilisation de modeles de mesure Reference number IEC IS0/IEC GUIDE 98-6:2021(E) @IS0/IEC 2021 IS0/IEC GUIDE 98-6:2021(E) COPYRIGHT PROTECTED DOCUMENT IS0/IEC2021 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting below orIso's memberbodyinthe countryofthe requester. ISO copyright office CP 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0/IEC 2021 - All rights reserved IS0/IEC GUIDE 98-6:2021(E) 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 established by the respective organization to deal with particular fields of technical activity. IsO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with IsO and IEC, also take part in the work. 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). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the Iso list of patent declarations received (see www.iso.org/patents) or the IEC list of patent declarations received (see patents.iec.ch). Any trade name used in this document is information given for the convenience of users and does not constituteanendorsement. 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 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-6:2020), and was adopted by the national bodies of ISO and IEC. A list of all parts in the ISO/IEC Guide 98 series can be found on the ISO and IEC websites. Given that ISO/IEC Guide 98-6 is identical in content to JCGM GUM-6, the decimal symbol is a point on the line in the English version. 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. @ IS0/IEC 2021 - All rights reserved ii ISO/IEC GUIDE 98-6:2021(E) Joint Committee for Guides in Metrology Guide to the expression of uncertainty in measurement 一 Part 6: Developing and using measurement models Guide pour I'expression de I'incertitude de mesure - Partie 6: Elaboration et utilisation des modeles de mesure JCGM GUM-6:2020 @ JCGM 2020 - All rights reserved @ IS0/IEC 2021 - All rights reserved ISO/IEC GUIDE 98-6:2021(E) Joint Committee for