EN 62740:2015
(Main)Root cause analysis (RCA)
Root cause analysis (RCA)
IEC 62740:2015 describes the basic principles of root cause analysis (RCA) and specifies the steps that a process for RCA should include. This standard identifies a number of attributes for RCA techniques which assist with the selection of an appropriate technique. It describes each RCA technique and its relative strengths and weaknesses. RCA is used to analyse the root causes of focus events with both positive and negative outcomes, but it is most commonly used for the analysis of failures and incidents. Causes for such events can be varied in nature, including design processes and techniques, organizational characteristics, human aspects and external events. RCA can be used for investigating the causes of non-conformances in quality (and other) management systems as well as for failure analysis, for example in maintenance or equipment testing. RCA is used to analyse focus events that have occurred, therefore this standard only covers a posteriori analyses. It is recognized that some of the RCA techniques with adaptation can be used proactively in the design and development of items and for causal analysis during risk assessment; however, this standard focuses on the analysis of events which have occurred. The intent of this standard is to describe a process for performing RCA and to explain the techniques for identifying root causes. These techniques are not designed to assign responsibility or liability, which is outside the scope of this standard. Keywords: root cause analysis (RCA), RCA techniques
Grundursachenanalyse
Analyse de cause initiale (RCA)
L'IEC 62740:2015 décrit les principes basiques de l'analyse de cause initiale (RCA) et spécifie les étapes qu'il convient qu'un processus de RCA inclue. La présente norme identifie plusieurs attributs de techniques de RCA, qui aident à sélectionner la technique appropriée. Elle décrit chaque technique de RCA, ainsi que ses points forts et limites. La RCA est utilisée pour analyser les causes initiales des événements d'accent, que leurs conséquences soient positives ou négatives, mais est plus couramment utilisée pour l'analyse des défaillances et des accidents. Les causes de tels événements peuvent être de nature multiple, notamment en fonction de la conception, des processus et des techniques, des caractéristiques organisationnelles, des aspects humains et des événements externes. La RCA peut être utilisée pour étudier les causes de non-conformité en termes de qualité (ou autres) des systèmes de gestion ainsi que pour l'analyse des défaillances, par exemple lors de la maintenance ou de l'essai des équipements. La RCA est utilisée pour analyser des événements d'accent qui se sont produits, cette norme ne couvre donc que les analyses a posteriori. Il est reconnu que certaines des techniques de RCA avec adaptations peuvent être utilisées de manière proactive lors de la conception et du développement d'entités et pour l'analyse causale au cours de l'évaluation des risques; cependant, la présente norme met l'accent sur l'analyse des événements qui se sont produits. L'objectif de la présente norme est de décrire un processus en vue de réaliser une RCA et d'expliquer les techniques permettant d'identifier les causes initiales. Lesdites techniques n'ont pas été conçues pour identifier la responsabilité ou la fiabilité, car ceci ne fait pas partie du domaine d'application de la présente norme. Mots clés: analyse de cause initiale (RCA), de techniques de RCA
Analiza izvornih razlogov (RCA) (IEC 62740:2015)
Ta mednarodni standard opisuje osnovne principe analize izvornih razlogov (RCA) in določa korake, ki jih mora proces analize izvornih razlogov vključevati. Ta standard opredeljuje več lastnosti tehnik RCA, ki so v pomoč pri izbiri primerne tehnike. Vsebuje opis vseh RCA tehnik ter njihovih prednosti in slabosti. RCA se uporablja za analizo izvornih razlogov ključnih dogodkov s pozitivnimi in negativnimi rezultati, vendar se najpogosteje uporablja za analizo okvar in incidentov. Razlogi za take dogodke se lahko razlikujejo, mednje pa spadajo procesi in tehnike načrtovanja, organizacijske lastnosti, človeški dejavniki in zunanji dogodki. RCA se lahko uporablja za iskanje vzrokov za neskladnosti pri sistemih vodenja kakovosti (in drugih sistemih vodenja), kot tudi za analizo okvar, na primer pri vzdrževanju in preskušanju opreme. RCA se uporablja za analizo ključnih dogodkov, ki so se zgodili, torej ta standard zajema samo
posteriorne analize. Priznava se, da se nekatere prilagojene RCA tehnike lahko uporablja proaktivno pri načrtovanju in razvoju izdelkov in za vzročno analizo med ocenjevanjem tveganja, vendar se ta standard osredotoča na analizo dogodkov, ki so se že zgodili. Namen tega standarda je opis postopka izvedbe RCA on razlaga tehnik za prepoznavanje izvornih razlogov. Te tehnike niso zasnovane za dodeljevanje odgovornosti ali določanje krivde, kar je zunaj področja uporabe tega standarda.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2015
Analiza izvornih razlogov (RCA) (IEC 62740:2015)
Root cause analysis (RCA) (IEC 62740:2015)
Ursachenanalyse (IEC 62740:2015)
Analyse de cause initiale (RCA) (IEC 62740:2015)
Ta slovenski standard je istoveten z: EN 62740:2015
ICS:
03.120.01 Kakovost na splošno Quality in general
29.020 Elektrotehnika na splošno Electrical engineering in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN 62740
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2015
ICS 03.120.01
English Version
Root cause analysis (RCA)
(IEC 62740:2015)
Analyse de cause initiale (RCA) Ursachenanalyse
(IEC 62740:2015) (IEC 62740:2015)
This European Standard was approved by CENELEC on 2015-03-20. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 62740:2015 E
Foreword
The text of document 56/1590/FDIS, future edition 1 of IEC 62740, prepared by IEC/TC 56
"Dependability" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be (dop) 2015-12-20
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2018-03-20
• latest date by which the national
standards conflicting with the
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 62740:2015 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60300-1 NOTE Harmonized as EN 60300-1.
IEC 61025 NOTE Harmonized as EN 61025.
IEC 61649 NOTE Harmonized as EN 61649.
IEC 61163-1 NOTE Harmonized as EN 61163-1.
IEC 62508:2010 NOTE Harmonized as EN 62508:2010 (not modified).
ISO/IEC 31010:2009 NOTE Harmonized as EN 31010:2010 (not modified).
- 3 - EN 62740:2015
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60050 Series - International Electrotechnical Vocabulary - -
(IEV)
IEC 62740 ®
Edition 1.0 2015-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Root cause analysis (RCA)
Analyse de cause initiale (RCA)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 03.120.01 ISBN 978-2-8322-2246-1
– 2 – IEC 62740:2015 © IEC 2015
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms, definitions and abbreviations . 9
3.1 Terms and definitions . 9
3.2 Abbreviations . 12
4 RCA – Overview . 12
5 The RCA process . 13
5.1 Overview. 13
5.2 Initiation . 14
5.3 Establishing facts . 15
5.4 Analysis . 17
5.4.1 Description . 17
5.4.2 The analysis team . 18
5.5 Validation . 19
5.6 Presentation of results . 19
6 Selection of techniques for analysing causes . 20
6.1 General . 20
6.2 Selection of analysis techniques . 20
6.3 Useful tools to assist RCA. 21
Annex A (informative) Summary and criteria of commonly used RCA techniques . 22
A.1 General . 22
A.2 RCA techniques . 22
A.3 Criteria . 23
Annex B (informative) RCA models . 26
B.1 General . 26
B.2 Barrier analysis . 26
B.2.1 Overview . 26
B.2.2 Strengths and limitations . 27
B.3 Reason’s model (Swiss cheese model) . 27
B.3.1 Overview . 27
B.3.2 Strengths and limitations . 28
B.4 Systems models . 28
B.5 Systems theoretic accident model and processes (STAMP) . 29
B.5.1 Overview . 29
B.5.2 Strengths and limitations . 29
Annex C (informative) Detailed description of RCA techniques . 30
C.1 General . 30
C.2 Events and causal factors (ECF) charting . 30
C.2.1 Overview . 30
C.2.2 Process . 31
C.2.3 Strengths and limitations . 31
C.3 Multilinear events sequencing (MES) and sequentially timed events plotting
(STEP) . 32
IEC 62740:2015 © IEC 2015 – 3 –
C.3.1 Overview . 32
C.3.2 Process . 32
C.3.3 Strengths and limitations . 33
C.4 The ‘why’ method . 35
C.4.1 Overview . 35
C.4.2 Process . 36
C.4.3 Strengths and limitations . 36
C.5 Causes tree method (CTM) . 36
C.5.1 Overview . 36
C.5.2 Process . 39
C.5.3 Strengths and limitations . 39
C.6 Why-because analysis (WBA) . 39
C.6.1 Overview . 39
C.6.2 Process . 42
C.6.3 Strengths and limitations . 42
C.7 Fault tree and success tree method . 42
C.7.1 Overview . 42
C.7.2 Process . 43
C.7.3 Strengths and limitations . 44
C.8 Fishbone or Ishikawa diagram . 44
C.8.1 Overview . 44
C.8.2 Process . 45
C.8.3 Strengths and limitations . 46
C.9 Safety through organizational learning (SOL) . 46
C.9.1 Overview . 46
C.9.2 Process . 46
C.9.3 Strengths and limitations . 47
C.10 Management oversight and risk tree (MORT) . 48
C.10.1 Overview . 48
C.10.2 Process . 48
C.10.3 Strengths and limitations . 48
C.11 AcciMaps .
...
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