BS EN BRITISHSTANDARD 61163-1:2006 Reliability stress screening Part l: Repairable assemblies manufactured in lots The European Standard EN 61163-1:2006 has the status of a British Standard ICS 31.020 BSi NO COPYINGWITHOUT BSIPERMISSIONEXCEPTASPERMITTEDBY COPYRIGHTLAW British Standards BSEN61163-1:2006 National foreword This British Standard is the UK implementation of EN 61163-1:2006. It is identical to IEC 61163-1:2006.It supersedes BS 5760-16-1:1996 which is withdrawn. 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 this committee can be obtained on request to its secretary. This publication 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. This British Standard was Amendments issued sincepublication published under the authority of the Standards Policy and Date Amd. No. Comments Strategy Committee on 31 August 2007 @BSI 2007 ISBN 978058054071 4 EUROPEANSTANDARD EN 61163-1 NORMEEUROPEENNE EUROPAISCHENORM December2006 ICS 03.120.01; 03.120.30; 21.020 English version Reliability stress screening Part 1: Repairable assemblies manufactured in lots (IEC 61163-1:2006) Déverminage sous contraintes Zuverlassigkeitsvorbehandlung durch Beanspruchung Partie1:Assemblagesréparables fabriques en lots Teil 1: Instandsetzbare Baugruppen, (CEI61163-1:2006) losweise gefertigt (IEC 61163-1:2006) 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. 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 Europeen de Normalisation Electrotechnique EuropaischesKomiteefur ElektrotechnischeNormung CentralSecretariat:ruedeStassart35,B-1050Brussels ?2006CENELEC- All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61163-1:2006 E EN61163-1:2006 - 2 - Foreword Dependability, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61163-1 on 2006-11-01. The following dates were fixed: latest date by which the EN has to be implemented 一 at national level by publication of an identical national standard orby endorsement (dop) 2007-08-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2009-11-01 AnnexZAhasbeenaddedbyCENELEC. Endorsement notice The text of the International Standard IEC 61163-1:2006 was approved by CENELEC as a European Standard without any modification. EN61163-1:2006 3 CONTENTS INTRODUCTION.. .6 1 Scope .9 2 Normative references 9 3 Terms and definitions 11 4 Symbols. ..13 5 General description ..13 5.1 Thereliability stress screeningprinciple 13 5.2 Failure categories.... 5.3 Time ofoccurrence of failures. ..16 Planning.. 6 ..16 6.1 Stress conditioning 6.2 Evaluation of the failure-free period TM.. 6.3 Time graphs for determination of the failure-free period. Pilot-production screening .25 7.1 General.. 7.2 Collection of information. ...25 7.3 Evaluationof information .25 7.4 Re-evaluating the fail