BS-EN-62308-2006.pdf
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1、BRITISH STANDARD BS EN 62308:2006 Equipment reliability Reliability assessment methods The European Standard EN 62308:2006 has the status of a British Standard ICS 03.120.01; 03.120.99 ? Licensed Copy: London South Bank University, London South Bank University, Sun Apr 01 14:46:59 GMT+00:00 2007, Un
2、controlled Copy, (c) BSI BS EN 62308:2006 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 March 2007 BSI 2007 ISBN 978 0 580 50405 1 National foreword This British Standard was published by BSI. It is the UK implementation of EN 62308:2006
3、. It is identical with IEC 62308:2006. The UK participation in its preparation was entrusted by Technical Committee DS/1, Dependability and terotechnology, to Subcommittee DS/1/1, Dependability. A list of organizations represented on DS/1/1 can be obtained on request to its secretary. This publicati
4、on does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank U
5、niversity, London South Bank University, Sun Apr 01 14:46:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 62308 NORME EUROPENNE EUROPISCHE NORM December 2006 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches
6、 Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62308:2006 E ICS 03.120.01; 03.120.99 English version Equipment reliability - Re
7、liability assessment methods (IEC 62308:2006) Fiabilit de lquipement - Mthodes dvaluation de la fiabilit (CEI 62308:2006) Zuverlssigkeit von Gerten - Verfahren zur Zuverlssigkeitsbewertung (IEC 62308:2006) This European Standard was approved by CENELEC on 2006-11-01. CENELEC members are bound to com
8、ply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Se
9、cretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status a
10、s the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal
11、, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: London South Bank University, London South Bank University, Sun Apr 01 14:46:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Foreword The text of document 56/1110/FDIS, future edition 1 of IEC 62308, prepa
12、red by IEC TC 56, Dependability, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62308 on 2006-11-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsemen
13、t (dop) 2007-08-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2009-11-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 62308:2006 was approved by CENELEC as a European Standard without any modif
14、ication. _ EN 62308:2006 2 Licensed Copy: London South Bank University, London South Bank University, Sun Apr 01 14:46:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI CONTENTS INTRODUCTION. 5 1 Scope. 6 2 Normative references . 6 3 Terms and definitions . 7 4 Abbreviations . 8 5 Symbols . 8 6 Introduc
15、tion to reliability assessment 9 6.1 Introductory remarks . 9 6.2 Description of reliability assessment 9 7 Management of reliability assessment process .13 7.1 Purpose of reliability assessment 13 7.2 Documentation 19 8 Data needs.19 8.1 Input data19 8.2 Data sources and types.20 8.3 Data collectio
16、n, storage, and retrieval .21 9 Reliability assessment methods21 9.1 Introduction .21 9.2 Similarity analysis .23 9.3 Durability analysis .25 9.4 Sensitivity testing and analysis26 9.5 Handbook predictions28 9.6 Limitations of reliability assessment results.30 10 Considerations for selecting reliabi
17、lity assessment methods.30 11 Reliability assessment process improvement32 11.1 General.32 11.2 Validating reliability assessment results 32 11.3 Improving the reliability assessment process.32 Annex A (informative) Similarity analysis examples.34 Annex B (informative) Durability analysis 46 Bibliog
18、raphy53 Figure 1 Methods requiring a reliability assessment as input13 Figure 2 Stages of product life cycle 17 Figure 3 Reliability assessment and improvement process.22 Figure A.1 Example similarity analysis flowchart 42 EN 62308:2006 3 Annex ZA (normative) Normative references to international pu
19、blications with their corresponding European publications 57 Licensed Copy: London South Bank University, London South Bank University, Sun Apr 01 14:46:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Table 1 Example of constant rate reliability measures11 Table 2 IEC Standards providing guidance on m
20、ethods .14 Table A.1 Example characteristic differences.41 Table A.2 Example high-level similarity analysis spreadsheet 43 Table A.3 Example low-level similarity analysis spreadsheet44 Table A.4 Example process difference factor tables.45 Table B.1 Values for exponent B for equations (B.7) and (B.8)
21、.50 EN 62308:2006 4 Licensed Copy: London South Bank University, London South Bank University, Sun Apr 01 14:46:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI INTRODUCTION This International Standard describes procedures that are intended for use in assessing the reliability of items based on data fr
22、om: the market of similar items; and field data and test data from suppliers of components and modules. The results of such assessments are intended for use as inputs to early equipment design decisions such as system architecture selection as well as business decisions such as estimating the cost o
23、f warranties or maintenance cost guarantees. Furthermore the results can be used as the initial estimate for input to safety analysis, for example FTA analysis. Modern electronic components and items are so reliable that estimating or verifying their reliability by testing is very difficult, therefo
24、re data from the field for previous similar items are often the only way to get an initial estimate of the reliability. Component manufacturers have used this method for years under the name of the “similarity principle”. By emphasising the use of data from previously marketed similar products, and
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