1、Comparative testing of consumer products and related services General principles PD ISO/IEC GUIDE 46:2017 BSI Standards Publication WB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National foreword This Published Document is the UK implementation of ISO/IEC GUIDE 46:2017. The UK participatio
2、n in its preparation was entrusted to Technical Com- mittee W/-, Consumer Products and Services Sector Policy and Strategy Committee. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary prov
3、isions of a contract. Users are responsible for its correct application. The British Standards Institution 2017. Published by BSI Standards Limited 2017 ISBN 978 0 580 97717 6 ICS 03.080.30; 19.020 Compliance with a British Standard cannot confer immunity from legal obligations. This Published Docum
4、ent was published under the authority of the Standards Policy and Strategy Committee on 28 February 2017. Amendments/corrigenda issued since publication Date Text affected PUBLISHED DOCUMENT PD ISO/IEC GUIDE 46:2017Comparative testing of consumer products and related services General principles Essa
5、is comparatifs des produits de consommation et de leurs services Principes gnraux Reference number ISO/IEC GUIDE 46:2017(E) ISO/IEC GUIDE 46 Second edition 2017-02 ISO/IEC 2017 PD ISO/IEC GUIDE 46:2017 ii ISO/IEC 2017 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2017, Published in Switze
6、rland All rights reserved. Unless otherwise specified, 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 on the internet or an intranet, without prior written permission. Permission can be req
7、uested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org ISO/IEC GUIDE 46:2017(E) PD ISO/IEC GUIDE 46:2
8、017 ISO/IEC GUIDE 46:2017(E)Foreword iv Introduction v 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 1 4 General principles . 1 4.1 Choice of products or services. 1 4.2 Sampling . 1 4.3 Choice of characteristics . 2 5 Test programme 2 5.1 Test methods . 2 5.2 Evaluation of test re
9、sults 2 5.3 Presentation of test results 2 Annex A (informative) Focus and range of comparative testing activities 3 Bibliography 5 ISO/IEC 2017 All rights reserved iii Contents Page PD ISO/IEC GUIDE 46:2017 ISO/IEC GUIDE 46:2017(E) Foreword ISO (the International Organization for Standardization) a
10、nd IEC (the International Electrotechnical Commission) are worldwide federations of national standards bodies (ISO member bodies and IEC National Committees). The work of preparing International Standards is normally carried out through ISO and IEC technical committees. Each member body interested i
11、n a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO or IEC, also take part in the work. ISO collaborates closely with the International Electrotechnical
12、 Commission (IEC) on all matters of electrotechnical standardization. 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 ISO docum
13、ents 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). 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 hel
14、d 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). Any trade name used in this document is informa
15、tion given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformit y assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Bar
16、riers to Trade (TBT) see the following URL: www . i s o .org/ iso/ foreword .html. This document was prepared by the ISO Committee on Consumer Policy (COPOLCO). This second edition cancels and replaces the first edition (ISO/IEC Guide 46:1985), which has been technically revised. The main changes co
17、mpared with the previous edition are as follows: clarification in the scope to exclude conformity assessment and anti-counterfeiting; clarification in Clauses 2 and 3 on the use of International Standards for accredited laboratories, e.g. ISO/IEC 17025; addition of Annex A to explain how comparative
18、 testing differs from other types of testing, including for market surveillance and conformity testing; updating of notes and bibliographical references.iv ISO/IEC 2017 All rights reserved PD ISO/IEC GUIDE 46:2017 ISO/IEC GUIDE 46:2017(E) Introduction This document sets out general principles for th
19、e conduct of comparative testing. These principles are applicable to consumer products, services and a combination of both. They can be used by bodies and associations which conduct comparative testing programmes. The purpose of this document is to enable meaningful test results and information to b
20、e presented in a way which will help consumers and others to make an informed choice suitable to their own needs. The products and services under test can be based on a local, national or international market and the characteristics tested can be either very specific or broadly based, provided that
21、the range and limits are clearly stated. NOTE 1 This document indicates some, but not all, of the means of applying the principles. NOTE 2 The purpose of comparative testing is different from that of conformity assessment testing (see ISO/IEC 17000). NOTE 3 Counterfeit goods are a real and growing p
22、roblem in all countries. While conformity assessment testing is much more likely to detect cases of counterfeit goods than comparative testing, counterfeit goods and other emerging challenges are creating a new environment for comparative testing organizations which might entail the need for closer
23、cooperation with regulatory authorities in the future. ISO/IEC 2017 All rights reserved v PD ISO/IEC GUIDE 46:2017 Comparative testing of consumer products and related services General principles 1 Scope This document establishes general principles for the conduct of comparative testing of products
24、and services for the information of consumers. It does not cover anti-counterfeiting or conformity assessment. NOTE ISO 12931 provides performance criteria for authentication solutions used to combat counterfeiting of material goods. The ISO Committee on Conformity Assessment (CASCO) develops standa
25、rds on conformity assessment. 2 Normative references There are no normative references in this document. 3 T erms a nd definiti ons For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following
26、addresses: ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp IEC Electropedia: available at h t t p :/ www .electropedia .org/ 3.1 comparative testing process of measuring the properties or performance of products 4 General principles 4.1 Choice of products or services Every r
27、easonable effort should be made to reflect what is or will be available on the market, unless the limits of selection are explained. NOTE “Reasonable efforts to reflect what is available on the market” might include consulting manufacturers (agents/representatives/importers) or checking current lite
28、rature, catalogues and a variety of other sources, including the Internet. It is in the interests of consumers and manufacturers (agents/representatives/importers) that such information be made available. 4.2 Sampling Samples for testing should be the same as those that are or intended to be availab
29、le to consumers. In all cases, care should be exercised that a selection is made at random and that special samples are not introduced. Attention should be paid to the conditions of sampling, transport, storage and the nature of the product or service before the test. Precautions should be taken to
30、ensure as far as possible that the results obtained are representative of the product or service offered on the market at the time of sampling. GUIDE ISO/IEC GUIDE 46:2017(E) ISO/IEC 2017 All rights reserved 1 PD ISO/IEC GUIDE 46:2017 ISO/IEC GUIDE 46:2017(E) Sampling should ensure as far as possibl
31、e that the product or service under test is likely to be available when the results are published. NOTE The nature of services varies in accordance with the great diversity of what is offered on the market, e.g. sampling for fast food service differs from that for a shuttle, educational or financial
32、 service. 4.3 Choice of characteristics Except in cases where a survey is made for a particular purpose, all characteristics of a product or service that are important for its use by the consumer should as far as possible be taken into account, unless the limits of selection are explained. NOTE The
33、choice of characteristics can include, for example, usability, safety, reliability, durability, performance, energy consumption, environmental aspects, operating costs, selling prices, labelling, maintenance and guarantees or warranties. 5 Test programme 5.1 Test methods Methods published in interna
34、tional, regional or national standards; by reputable technical organizations, in relevant scientific texts or journals, or as specified by the manufacturer of the test equipment are recommended. Laboratory-developed or modified methods, or methods adapted by the laboratory may also be used if they a
35、re appropriate for the intended use and if they are validated. Where test methods other than internationally or nationally recognized ones are used, it would be useful to inform the national standards body for their possible incorporation into a standard. 5.2 Evaluation of test results Organizations
36、 conducting tests should have processes in place to minimize errors in testing or interpretation of results, e.g. having competency requirements for technical staff or consulting with technical experts. The test results submitted to the manufacturer (agent/representative/ importer) should be accompa
37、nied by the list of characteristics tested and the test methods used. If the manufacturer (agent/representative/importer) disagrees with the test results, the manufacturer should promptly supply data to demonstrate that the test results are incorrect or exceptional, or that the test methods used wer
38、e unsuitable. In the case of exceptional results, it is appropriate to take further samples. The manufacturer (agent/representative/importer) and, where appropriate, relevant authorities and users, should be notified if the tests show that the product or service could put the consumer at unacceptabl
39、e risk. Notification should be made as soon as possible if danger is imminent. 5.3 Presentation of test results Test results should be presented factually in a technically correct manner, as well as in terms comprehensible to the consumer. Test results should be presented in a format that makes it e
40、asy for consumers to make an informed decision when selecting a product or service. It should be clear from the report, when samples were acquired and the testing was done/performed. In cases where, in spite of verification procedures, major factual errors are found in published reports, corrections
41、 should be published at the earliest possible opportunity.2 ISO/IEC 2017 All rights reserved PD ISO/IEC GUIDE 46:2017 ISO/IEC GUIDE 46:2017(E) Annex A (informative) Focus and range of comparative testing activities Comparative testing exists in several formats, including product and services testing
42、 carried out by consumer organizations, but there are many other formats, e.g. New Car Assessment Programmes (NCAPs) or restaurant guides with stars or points ratings. Comparative testing should not be confused with market surveillance, the search for counterfeit products or quality control. Quality
43、 control investigates how stable the quality of a product is and requires testing many samples of the same model. This is not the approach of comparative testing, which is often based on the investigation of one sample. Every sample is deemed to fall within the quality borders set by the manufacture
44、r. Where there is substantial doubt as to whether the sample is representative or not, a new sample should be procured for comparative testing. Counterfeiting can be detected by quality control from field samples but is, generally speaking, more an issue of fraud rather than of technical quality. Co
45、unterfeiting might remain undetected by comparative testing because detection requires specific information on the product which only the manufacturer possesses. When, in a comparative test, there is any doubt as to whether a sample is a counterfeit or not, a new sample is procured. Market surveilla
46、nce aims at checking whether the quality of products (including labelling) conforms to a standard(s) and/or to legislation. Although these aspects may be part of a comparative test, it is not the primary purpose. While market surveillance results in binary information (passed/not passed), the aim of
47、 comparative testing is a more detailed differentiation of product quality. The purpose of comparative testing is to inform the reader about the advantages and disadvantages of products. It often ranks them from best to worst in class, but it is also possible to give different rankings for different
48、 types of users, based on the same tests. For the purpose of comparative testing existing standards may not be sufficient to compare all aspects of product quality. Reasons could be that often standards set minimum requirements (and are efficient for that purpose) but lack additional aspects of perf
49、ormance, convenience and user friendliness. If in these cases the application of different or more complex methodologies is necessary, extended methods should as far as possible and feasible be based on existing standards. Comparative testing generally tries to assess the quality and efficiency of a product, in addition to determining its compliance to a standard or specific user requirements. Procurement of samples for comparative tests needs to take into account the nature of the product, e.g. some foods require continuous coolin
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