EN 61124:2006

Reliability testing - Compliance tests for constant failure rate and constant failure intensity

This International Standard gives a number of optimized test plans, the corresponding operating characteristic curves and expected test times. In addition the algorithms for designing test plans using a spreadsheet program are also given, together with guidance on how to choose test plans. This standard does not cover guidance on how to plan, perform, analyse and report a test. This information can be found in IEC 60300-3-5. This standard does not describe test conditions. This information can be found in IEC 60605-2 and in IEC 60605, Parts 3-1 to 3-6.

Prüfungen der Funktionsfähigkeit - Prüfpläne für konstante Ausfallrate und konstante Ausfalldichte

Essais de fiabilité - Plans d'essais de conformité d'un taux de défaillance constant et d'une intensité de défaillance constante

La présente Norme internationale fournit un certain nombre de plans d'essais optimisés, les courbes d'efficacité associées et les valeurs moyennes des temps d'essais. De plus, les algorithmes pour la conception de plans d'essais à l'aide d'un tableur électronique sont également fournis avec des lignes directrices sur la manière de choisir les plans d'essais. La présente norme ne couvre pas les lignes directrices sur la manière de planifier, réaliser, analyser et faire un rapport sur un essai. Ces informations sont données dans la CEI 60300-3-5. La présente norme ne couvre pas les conditions d'essais. Ces informations sont données dans la CEI 60605-2 et la CEI 60605, Parties 3-1 à 3-6.

Preskušanje zanesljivosti – Ustreznostni preskusi za konstantno pogostost odpovedi in konstantno intenzivnost odpovedi (IEC 61124:2006)

General Information

• Status: Withdrawn
• Publication Date: 15-Jun-2006
• Withdrawal Date: 30-Apr-2009
• ICS: 03.120.30 - Application of statistical methods
• ICS: 19.020 - Test conditions and procedures in general
• ICS: 21.020 - Characteristics and design of machines, apparatus, equipment
• Technical Committee: CLC/SR 56 - Dependability
• Drafting Committee: IEC/TC 56 - IEC_TC_56
• Parallel Committee: IEC/TC 56 - IEC_TC_56
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 27-Jun-2015
• Completion Date: 27-Jun-2015
• Ref Project: SIST EN 61124:2007 - Reliability testing - Compliance tests for constant failure rate and constant failure intensity

Relations

• Replaced By: EN 61124:2012 - Reliability testing - Compliance tests for constant failure rate and constant failure intensity
• Effective Date: 29-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2007
Preskušanje zanesljivosti – Ustreznostni preskusi za konstantno pogostost
odpovedi in konstantno intenzivnost odpovedi (IEC 61124:2006)
Reliability testing - Compliance tests for constant failure rate and constant failure
intensity
Prüfungen der Funktionsfähigkeit - Prüfpläne für konstante Ausfallrate und konstante
Ausfalldichte
Essais de fiabilité - Plans d'essais de conformité d'un taux de défaillance constant et
d'une intensité de défaillance constante
Ta slovenski standard je istoveten z: EN 61124:2006
ICS:
19.020 Preskuševalni pogoji in Test conditions and
postopki na splošno procedures in general
21.020 =QDþLOQRVWLLQQDþUWRYDQMH Characteristics and design of
VWURMHYDSDUDWRYRSUHPH machines, apparatus,
equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61124
NORME EUROPÉENNE
June 2006
EUROPÄISCHE NORM
ICS 03.120.30; 19.020; 21.020
English version
Reliability testing -
Compliance tests for constant failure rate
and constant failure intensity
(IEC 61124:2006)
Essais de fiabilité - Prüfungen der Funktionsfähigkeit -
Plans d'essais de conformité d'un taux de Prüfpläne für konstante Ausfallrate
défaillance constant et d'une intensité de und konstante Ausfalldichte
défaillance constante (IEC 61124:2006)
(CEI 61124:2006)
This European Standard was approved by CENELEC on 2006-05-01. CENELEC members are bound to comply
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 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, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für 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 61124:2006 E
Foreword
The text of document 56/1081/FDIS, future edition 2 of IEC 61124, prepared by IEC TC 56,
Dependability, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 61124 on 2006-05-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2007-02-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2009-05-01
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61124:2006 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 61124:2006
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

1)
IEC 60050-191 - International Electrotechnical Vocabulary - -
(IEV)
Chapter 191: Dependability and quality of
service
IEC 60300-3-5 2001 Dependability management - -
Part 3-5: Application guide - Reliability test
conditions and statistical test principles

1)
IEC 60605-2 - Equipment reliability testing - -
Part 2: Design of test cycles
IEC 60605-3 Series Equipment reliability testing - -
Part 3: Preferred test conditions

IEC 60605-4 2001 Equipment reliability testing - -
Part 4: Statistical procedures for exponential
distribution - Point estimates, confidence
intervals, prediction intervals and tolerance
intervals
1)
IEC 60605-6 - Equipment reliability testing - -
Part 6: Tests for the validity of the constant
failure rate or constant failure intensity
assumptions
IEC 61123 1991 Reliability testing - Compliance test plans for - -
success ration
1)
Undated reference.
NORME CEI
INTERNATIONALE
IEC
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2006-03
Essais de fiabilité –
Plan d'essais de conformité d'un taux de
défaillance constant et d'une intensité
de défaillance constante
Reliability testing –
Compliance tests for constant failure rate
and constant failure intensity

 IEC 2006 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
CODE PRIX
XF
PRICE CODE
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

61124 © IEC:2006 – 3 –
CONTENTS
FOREWORD. 15
1 Scope. 19
2 Normative references. 19
3 Terms, definitions, symbols and acronyms . 21
3.1 Terms and definitions . 21
3.2 Acronyms and symbols . 21
4 General requirements and area of application. 25
4.1 Requirements . 25
4.2 Applicability to replaced and repaired items . 25
4.3 Types of test plans. 27
5 General test procedure. 29
5.1 Test conditions . 29
5.2 General characteristics of the test plans. 29
5.3 Data to be recorded. 31
*
5.4 Calculation of accumulated test time, T . 31
5.5 Number of failures. 33
6 Sequential test plans . 33
6.1 General. 33
6.2 Common test procedure. 33
6.3 Decision criteria. 35
6.4 Overview of test plans . 35
7 Fixed time/failure terminated test plans – Fixed duration test plans. 37
7.1 General. 37
7.2 Common test procedure. 37
7.3 Decision criteria. 37
7.4 Test plans . 39
8 Design of alternative time/failure terminated test plans . 39
8.1 General. 39
8.2 Design procedures . 41
8.3 Common test procedure. 41
8.4 Decision criteria. 41
9 Calendar time/failure terminated test plans for non-replaced items . 43
9.1 General. 43
9.2 Common test procedure. 43
9.3 Decision criteria. 43
9.4 Use of Table 2 of IEC 61123:1991 for fixed calendar time tests . 45
10 Combined test plans . 47
10.1 General. 47
10.2 Common test procedure. 47
10.3 Decision criteria. 47
10.4 Test plans . 49
11 Performing the test . 49
12 Presentation of results . 49

61124 © IEC:2006 – 5 –
Annex A (normative) Tables and graphs for sequential test plans . 51
Annex B (normative) Graphs for fixed time/failure terminated test plans . 89
Annex C (normative) Graphs for alternative time/failure terminated test plans. 107
Annex D (normative) Tables and graphs for combined test plans and additional
sequential test plans. 121
Annex E (informative) Examples and mathematical references for sequential test
plans. 159
Annex F (informative) Design of sequential test plans using a spreadsheet program. 175
Annex G (informative) Examples and mathematical references for fixed duration
time/failure terminated test plans . 197
Annex H (informative) Design of fixed duration time/failure terminated test plans
using a spreadsheet program. 201
Annex I (informative) Examples and mathematical references for the design of
alternative time/failure terminated test plans . 213
Annex J (informative) Examples and mathematical references for the calendar time
terminated test plans . 229
Annex K (informative) Derivation and mathematical reference for the optimized test
plans of GOST 27.402 . 233
Bibliography. 249
Figure A.1 – Accept and reject lines for test plan A.1 . 51
Figure A.2 – Test plan A.1 – Operating characteristic curve . 55
Figure A.3 – Test plan A.1 – Expected accumulated test time to decision. 55
Figure A.4 – Accept and reject lines for test plan A.2 . 57
Figure A.5 – Test plan A.2 – Operating characteristic curve . 59
Figure A.6 – Test plan A.2 – Expected accumulated test time to decision. 59
Figure A.7 – Accept and reject lines for test plan A.3 . 61
Figure A.8 – Test plan A.3 – Operat
...