EUROPEANSTANDARD EN 62308 NORMEEUROPEENNE EUROPAISCHE NORM December2006 ICS 03.120.01; 03.120.99 English version Equipment reliability - Reliability assessment methods (IEC 62308:2006) Fiabilite de I'équipement Zuverlassigkeit von Geraten Methodes d'évaluation de la fiabilite VerfahrenzurZuverlassigkeitsbewertung (CEI62308:2006) (IEC62308:2006) 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 Secretariat 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 as the official versions. CENELEC members are the national electrotechnical commitees 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, Romania, Slovakia, Siovenia, Spain, Sweden, Switzerland and the United Kingdom. CENELEC EuropeanCommitteeforElectrotechnical Standardization Comite Européen de Normalisation Electrotechnique Europaisches Komitee fur Elektrotechnische Normung Central Secretariat: ruede Stassart 35, B -1050Brussels @2006CENELEC- All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref.No.EN 62308:2006 E - 2 - EN 62308:2006 Foreword The text of document 56/1110/FDIS,f future edition 1 of IEC 62308, prepared by IEC TC 56, Dependability, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62308 on2006-11-01. 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standard or by endorsement (dop) 2007-08-01 latest date by which the national standards conflicting withthe ENhavetobe withdrawn (dow) 2009-11-01 AnnexZA hasbeenadded byCENELEC Endorsement notice The text of the International Standard IEC 62308:2006 was approved byCENELEC asa European Standardwithout anymodification. - 3 - EN62308:2006 CONTENTS INTRODUCTION 5 1 Scope 2 Normative references 9 3 Terms and definitions 4 Abbreviations 8 5 Symbols 6 Introductiontoreliabilityassessment 6.1 Introductoryremarks.. 9 6.2 Descriptionofreliabilityassessment. Managementofreliabilityassessmentprocess 13 7 7.1 Purposeof reliability assessment 7.2 Documentation .19 Data needs. 8 8.1 Input data.. 8.2 Data sources and types... 8.3 Data collection, storage, and retrieval Reliability assessment methods. 9 .21 9.1 Introduction.... .21 9.2 Similarity analysis .23 9.3 Durability analysis.. .25 9.4 Sensitivity testing and analysis. .26 9.5 Handbook predictions. .28 9.6 Limitations of reliability assessment results .30 10 Considerationsforselectingreliabilityassessmentmethods .30 11Reliabilityassessmentprocess improvement.. ..32 11.1 General... ...32 11.2Validatingreliabilityassessmentresults ..32 11.3Improvingthereliabilityassessmentprocess .32 AnnexA(informative)Similarityanalysisexamples. ...34 Annex B (informative)Durability analysis .46 Annex ZA(normative)Normative references to international publications with their correspondingEuropean publications ..57 Bibliography. ..53 Figure1-Methods requiringa reliabilityassessmentas input. .13 Figure 2 - Stages of product life cycle .. ..17 Figure3-Reliability assessment and improvementprocess 22 FigureA.1-Examplesimilarityanalysisflowchart 42 - 4- EN 62308:2006 Table1-Exampleof constant ratereliabilitymeasures Table 2-IEC Standards providing guidance on methods ..14 Table A.1-Example characteristic differences.. ..41 Table A.2 - Example high-level similarity analysis spreadsheet. .....43 Table