IEC 62429-2007 Reliability growth - Stress testing for early failures in unique complex systems《可靠性增长.在特定综合系统中的早期失效压力测试 n》.pdf

1、 IEC 62429Edition 1.0 2007-11INTERNATIONAL STANDARD NORME INTERNATIONALEReliability growth Stress testing for early failures in unique complex systems Croissance de fiabilit Essais de contraintes pour rvler les dfaillances prcoces dun systme complexe et unique IEC62429:2007THIS PUBLICATION IS COPYRI

2、GHT PROTECTED Copyright 2007 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC

3、or IECs member National Committee in the country of the requester. If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information. Droits de r

4、eproduction rservs. Sauf indication contraire, aucune partie de cette publication ne peut tre reproduite ni utilise sous quelque forme que ce soit et par aucun procd, lectronique ou mcanique, y compris la photocopie et les microfilms, sans laccord crit de la CEI ou du Comit national de la CEI du pay

5、s du demandeur. Si vous avez des questions sur le copyright de la CEI ou si vous dsirez obtenir des droits supplmentaires sur cette publication, utilisez les coordonnes ci-aprs ou contactez le Comit national de la CEI de votre pays de rsidence. IEC Central Office 3, rue de Varemb CH-1211 Geneva 20 S

6、witzerland Email: inmailiec.ch Web: www.iec.ch About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. About IEC publications The technical conten

7、t of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigenda or an amendment might have been published. Catalogue of IEC publications: www.iec.ch/searchpub The IEC on-line Catalogue enables you to search by a variety of criteria (ref

8、erence number, text, technical committee,). It also gives information on projects, withdrawn and replaced publications. IEC Just Published: www.iec.ch/online_news/justpub Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available on-lin

9、e and also by email. Electropedia: www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical Voc

10、abulary online. Customer Service Centre: www.iec.ch/webstore/custserv If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service Centre FAQ or contact us: Email: csciec.ch Tel.: +41 22 919 02 11 Fax: +41 22 919 03 00 A propos de la CEI La C

11、ommission Electrotechnique Internationale (CEI) est la premire organisation mondiale qui labore et publie des normes internationales pour tout ce qui a trait llectricit, llectronique et aux technologies apparentes. A propos des publications CEI Le contenu technique des publications de la CEI est con

12、stamment revu. Veuillez vous assurer que vous possdez ldition la plus rcente, un corrigendum ou amendement peut avoir t publi. Catalogue des publications de la CEI: www.iec.ch/searchpub/cur_fut-f.htm Le Catalogue en-ligne de la CEI vous permet deffectuer des recherches en utilisant diffrents critres

13、 (numro de rfrence, texte, comit dtudes,). Il donne aussi des informations sur les projets et les publications retires ou remplaces. Just Published CEI: www.iec.ch/online_news/justpub Restez inform sur les nouvelles publications de la CEI. Just Published dtaille deux fois par mois les nouvelles publ

14、ications parues. Disponible en-ligne et aussi par email. Electropedia: www.electropedia.org Le premier dictionnaire en ligne au monde de termes lectroniques et lectriques. Il contient plus de 20 000 termes et dfinitions en anglais et en franais, ainsi que les termes quivalents dans les langues addit

15、ionnelles. Egalement appel Vocabulaire Electrotechnique International en ligne. Service Clients: www.iec.ch/webstore/custserv/custserv_entry-f.htm Si vous dsirez nous donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du Service clients ou contactez-nous: Ema

16、il: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 62429Edition 1.0 2007-11INTERNATIONAL STANDARD NORME INTERNATIONALEReliability growth Stress testing for early failures in unique complex systems Croissance de fiabilit Essais de contraintes pour rvler les dfaillances prcoces dun systme c

17、omplexe et unique INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE WICS 03.120.01; 03.120.99 PRICE CODECODE PRIXISBN 2-8318-9427-1 2 62429 IEC:2007 CONTENTS FOREWORD.4 1 Scope.6 2 Normative references .6 3 Terms, definitions, abbreviations and symbols7 3.1 Terms a

18、nd definitions 7 3.2 Acronyms 9 3.3 Symbols 9 4 General 10 5 Planning and performing a reliability growth test.13 5.1 Step 1 Should a reliability growth test be used? .13 5.2 Step 2 Failure definitions and data collection13 5.3 Step 3 Stress levels14 5.3.1 General .14 5.3.2 Increased operating load

19、.14 5.3.3 Increased environmental stress .15 5.4 Step 4 Failure analysis and classification of failures .15 5.4.1 General .15 5.4.2 Relevant failures .16 5.4.3 Non-relevant failures .17 5.5 Step 5 Stop criteria.17 5.5.1 General .17 5.5.2 Method 1 Fixed testing programs17 5.5.3 Method 2 Graphical ana

20、lysis.18 5.5.4 Method 3 Success ratio test19 5.5.5 Method 4 Estimation of reliability 21 5.5.6 Method 5 Comparison with acceptable instantaneous failure intensity.22 5.5.7 Method 6 Estimation of remaining latent faults24 5.5.8 Method 7 Reliability indicator testing 24 5.6 Step 6 Verification of repa

21、irs and reliability growth .25 5.7 Step 7 Reporting and feedback.26 Annex A (informative) Practical example of method 3 Success ratio test.27 Annex B (informative) Practical example of method 5 Comparison with acceptable instantaneous failure intensity.28 Annex C (informative) Practical example of m

22、ethod 6 Estimation of remaining latent faults 31 Bibliography33 Figure 1 The bathtub curve 12 Figure 2 Evaluating whether the cumulative failure curve has levelled out18 Figure 3 Method 219 Figure B.1 A reliability growth plot of the data from Table B.1 29 62429 IEC:2007 3 Table 1 Probability that a

23、 system with failure probability of 0,001 will pass N successive tests .21 Table 2 Probability that a system with failure probability of 0,000 001 will pass N successive tests .21 Table 3 Correct and incorrect decisions using reliability indicators.25 Table B.1 Reliability growth and stopping times

24、for the practical example 28 Table C.1 Determining when to stop the test32 4 62429 IEC:2007 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ RELIABILITY GROWTH STRESS TESTING FOR EARLY FAILURES IN UNIQUE COMPLEX SYSTEMS FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organi

25、zation for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, I

26、EC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt wi

27、th may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by a

28、greement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) I

29、EC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are u

30、sed or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the

31、corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have

32、the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoev

33、er, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publicatio

34、ns is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard

35、 IEC 62429 has been prepared by IEC technical committee 56: Dependability. The text of this standard is based on the following documents: FDIS Report on voting 56/1232/FDIS 56/1249/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in

36、the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data relate

37、d to the specific publication. At this date, the publication will be 62429 IEC:2007 5 reconfirmed, withdrawn, replaced by a revised edition, or amended. 6 62429 IEC:2007 RELIABILITY GROWTH STRESS TESTING FOR EARLY FAILURES IN UNIQUE COMPLEX SYSTEMS 1 Scope This International Standard gives guidance

38、for reliability growth during final testing or acceptance testing of unique complex systems. It gives guidance on accelerated test conditions and criteria for stopping these tests. “Unique” means that no information exists on similar systems, and the small number of produced systems means that infor

39、mation deducted from the test has limited use for future production. This standard concerns reliability growth of repairable complex systems consisting of hardware with embedded software. It can be used for describing the procedure for acceptance testing, “running-in“, and to ensure that reliability

40、 of a delivered system is not compromised by coding errors, workmanship errors or manufacturing errors. It only covers the early failure period of the system life cycle and neither the constant failure period, nor the wear out failure period. It can also be used when a company wants to optimize the

41、duration of internal production testing during manufacturing of prototypes, single systems or small series. It is applicable mainly to large hardware/software systems, but does not cover large networks, for example telecommunications and power networks, since new parts of such systems cannot usually

42、 be isolated during the testing. It does not cover software tested alone, but the methods can be used during testing of large embedded software programs in operational hardware, when simulated operating loads are used. It addresses growth testing before or at delivery of a finished system. The testi

43、ng can therefore take place at the manufacturers or at the end users premises. If the user of a system performs reliability growth by a policy of updating hardware and software with improved versions, this standard can be used to guide the growth process. This standard covers a wide field of applica

44、tions, but is not applicable to health or safety aspects of systems. This standard does not apply to systems that are covered by IEC 6227939. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited

45、 applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050-191:1990, International Electrotechnical Vocabulary Chapter 191: Dependability and quality of service IEC 60300-3-5, Dependability management Part 3-5: Application guide Reli

46、ability test conditions and statistical test principles IEC 60605-2, Equipment reliability testing Part 2 Design of test cycles 62429 IEC:2007 7 IEC 61163-1:2006, Reliability stress screening Part 1: Repairable assemblies manufactured in lots IEC 61163-2, Reliability stress screening Part 2: Electro

47、nic components IEC 61164, Reliability growth Statistical test and estimation methods IEC 61710, Power law model Goodness-of-fit and estimation methods 3 Terms, definitions, abbreviations and symbols 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 6

48、0050-191, as well as the following, apply. 3.1.1 time compression reducing test time by testing with higher use time than in the field NOTE An example is testing a system that is used 8 h a day for 24 h a day. 3.1.2 accelerated test test in which the applied stress level is chosen to exceed that sta

49、ted in the reference conditions in order to shorten the time duration required to observe the stress response of the item, or to magnify the response in a given time duration NOTE To be valid, an accelerated test should not alter the basic fault modes and failure mechanisms, or their relative prevalence. IEV 191-14-07 3.1.3 (time) acceleration factor r