EN 62741:2015
(Main)Demonstration of dependability requirements - The dependability case
Demonstration of dependability requirements - The dependability case
IEC 62741:2015 gives guidance on the content and application of a dependability case and establishes general principles for the preparation of a dependability case. This standard is written in a basic project context where a customer orders a system that meets dependability requirements from a supplier and then manages the system until its retirement. The methods provided in this standard may be modified and adapted to other situations as needed. The dependability case is normally produced by the customer and supplier but can also be used and updated by other organizations. For example, certification bodies and regulators may examine the submitted case to support their decisions and users of the system may update/expand the case, particularly where they use the system for a different purpose. Keywords: dependability, reliability, availability, maintainability, supportability, usability, testability, durability.
Leitfaden zur Darlegung von Zuverlässigkeitsanforderungen - Der Zuverlässigkeitsnachweis
Démonstration des exigences de sûreté de fonctionnement - Argumentaire dans le cadre de la sûreté de fonctionnement
L'IEC 62741:2015 fournit des lignes directrices concernant le contenu et l'application d'une étude de sûreté de fonctionnement et établit les principes généraux pour la préparation d'une étude de sûreté de fonctionnement. La présente norme est rédigée dans le cadre d'un projet de base où un client commande un système qui satisfait aux exigences de sûreté de fonctionnement d'un fournisseur et gère alors le système jusqu'à sa mise hors service. Les méthodes fournies dans cette norme peuvent être modifiées et adaptées aux autres situations, si nécessaire. L'étude de sûreté de fonctionnement est normalement produite par le client et le fournisseur et peut également être utilisée et mise à jour par d'autres organisations. Par exemple, les organismes de certification et législateurs peuvent examiner l'étude soumise pour étayer leurs décisions et les utilisateurs du système peuvent mettre à jour/développer l'étude, notamment lorsqu'ils utilisent le système à une autre fin. Mots clés: sûreté de fonctionnement, la fiabilité, la disponibilité, la maintenabilité, l'aptitude au soutien, l'utilisation, la testability, la durabilité.
Vodilo za predstavitev zahtev za zagotovljivost - Primer zagotovljivosti
Ta mednarodni standard nudi smernice glede vsebine in uporabe primera zagotovljivosti in vzpostavlja osnovne principe za pripravo primera zagotovljivosti. Ta standard je napisan v okviru osnovnega projekta, kjer stranka pri dobavitelju naroči sistem, ki ustreza zahtevam za zagotovljivost, in ga nato upravlja do konca življenjske dobe. Metodo, ki jo ta standard zagotavlja, se lahko po potrebi spremeni in prilagodi, da ustreza drugačnim situacijam. Primer zagotovljivosti navadno ustvarita stranka in dobavitelj, lahko pa ga uporabljajo in posodabljajo tudi druge organizacije. Na primer, certifikacijski in upravni organi lahko pregledajo dobljeni primer, da lahko podprejo svoje odločitve, uporabniki sistema pa lahko posodobijo/razširijo primer, posebej če uporabljajo sistem v drugačne namene.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2015
Vodilo za predstavitev zahtev za zagotovljivost - Primer zagotovljivosti
Guide to the demonstration of dependability requirements - The dependability case
Leitfaden zur Darlegung von Zuverlässigkeitsanforderungen - Der
Zuverlässigkeitsnachweis
Démonstration des exigences de sûreté de fonctionnement - Argumentaire dans le cadre
de la sûreté de fonctionnement
Ta slovenski standard je istoveten z: EN 62741:2015
ICS:
03.120.01 Kakovost na splošno Quality 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 62741
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2015
ICS 21.020; 03.120.01
English Version
Demonstration of dependability requirements -
The dependability case
(IEC 62741:2015)
Démonstration des exigences de sûreté de fonctionnement Leitfaden zur Darlegung von Zuverlässigkeitsanforderungen
- Argumentaire dans le cadre de la sûreté de - Der Zuverlässigkeitsnachweis
fonctionnement (IEC 62741:2015)
(IEC 62741:2015)
This European Standard was approved by CENELEC on 2015-03-24. 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 62741:2015 E
Foreword
The text of document 56/1591/FDIS, future edition 1 of IEC 62741, 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) 2015-12-24
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2018-03-24
• 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 62741:2015 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 60300-3-1 NOTE Harmonized as EN 60300-3-1.
IEC 60300-3-4 NOTE Harmonized as EN 60300-3-4.
IEC 61078 NOTE Harmonized as EN 61078.
IEC 62347 NOTE Harmonized as EN 62347.
IEC/ISO 31010 NOTE Harmonized as EN 31010.
IEC 62198 NOTE Harmonized as EN 62198.
- 3 - EN 62741:2015
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 60050-192 - International electrotechnical vocabulary - - -
Part 192: Dependability
IEC 60300-1 - Dependability management -- EN 60300-1 -
Part 1: Guidance for management and
application
ISO 31000 - Risk management - Principles and - -
guidelines
IEC 62741 ®
Edition 1.0 2015-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Demonstration of dependability requirements – The dependability case
Démonstration des exigences de sûreté de fonctionnement – Argumentaire
dans le cadre de la sûreté de fonctionnement
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 03.120.01; 21.020 ISBN 978-2-8322-2247-8
– 2 – IEC 62741:2015 © IEC 2015
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviations . 7
3.1 Terms and definitions . 7
3.2 Abbreviations . 8
4 Background to the dependability case . 8
4.1 Principles and purpose . 8
4.2 Relationship between the dependability case and dependability plans . 9
4.3 Progressive assurance of dependability . 10
5 Principles of the dependability case . 11
5.1 Description of the dependability case . 11
5.2 Making claims in the dependability case . 12
5.3 Using evidence in the dependability case . 13
5.4 Evidence framework . 14
5.5 Dependability case report . 16
6 Development of the dependability case . 16
6.1 General . 16
6.2 Preparation of the dependability case . 17
6.3 Concept stage . 18
6.4 Development stage . 19
6.5 Realization stage . 19
6.6 Utilization stage . 20
6.7 Enhancement stage . 20
6.8 Retirement stage . 20
7 Assessing the adequacy of evidence . 21
Annex A (informative) Evidence framework . 22
A.1 General . 22
A.2 Abbreviations used only in this annex . 23
Annex B (informative) General requirements for the dependability case report . 40
B.1 General . 40
B.2 Elements required for the dependability case report . 40
B.3 Context and assumptions . 40
B.3.1 Stakeholders . 40
B.3.2 System description . 41
B.3.3 Dependability requirements . 41
B.3.4 Limitations on use . 41
B.3.5 Assumptions . 41
B.4 Risks . 41
B.5 Dependability plan . 42
B.6 The evidence framework . 42
B.7 Body of evidence . 42
B.8 Review of evidence to date . 42
B.9 Dependability claims and argument . 42
IEC 62741:2015 © IEC 2015 – 3 –
B.10 Conclusions and recommendations . 42
Annex C (informative) Checklist of points for assessing the adequacy of evidence . 44
Bibliography . 45
Figure 1 – Illustration of progressive assurance process . 11
Figure 2 – The development of claims . 12
Figure 3 – Establishment and development of the evidence framework . 15
Table A.1 – Evidence framework for system “X” . 24
Table A.2 – Evidence framework for system Y . 28
– 4 – IEC 62741:2015 © IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
______________
DEMONSTRATION OF DEPENDABILITY REQUIREMENTS –
THE DEPENDABILITY CASE
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be cl
...
SLOVENSKI STANDARD
01-september-2015
Vodilo za predstavitev zahtev za zagotovljivost - Primer zagotovljivosti
Guide to the demonstration of dependability requirements - The dependability case
Leitfaden zur Darlegung von Zuverlässigkeitsanforderungen - Der
Zuverlässigkeitsnachweis
Démonstration des exigences de sûreté de fonctionnement - Argumentaire dans le cadre
de la sûreté de fonctionnement
Ta slovenski standard je istoveten z: EN 62741:2015
ICS:
03.120.01 Kakovost na splošno Quality in general
21.020 Značilnosti in načrtovanje Characteristics and design of
strojev, aparatov, opreme machines, apparatus,
equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN 62741
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2015
ICS 21.020; 03.120.01
English Version
Demonstration of dependability requirements -
The dependability case
(IEC 62741:2015)
Démonstration des exigences de sûreté de fonctionnement Leitfaden zur Darlegung von Zuverlässigkeitsanforderungen
- Argumentaire dans le cadre de la sûreté de - Der Zuverlässigkeitsnachweis
fonctionnement (IEC 62741:2015)
(IEC 62741:2015)
This European Standard was approved by CENELEC on 2015-03-24. 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 62741:2015 E
Foreword
The text of document 56/1591/FDIS, future edition 1 of IEC 62741, 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) 2015-12-24
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2018-03-24
• 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 62741:2015 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 60300-3-1 NOTE Harmonized as EN 60300-3-1.
IEC 60300-3-4 NOTE Harmonized as EN 60300-3-4.
IEC 61078 NOTE Harmonized as EN 61078.
IEC 62347 NOTE Harmonized as EN 62347.
IEC/ISO 31010 NOTE Harmonized as EN 31010.
IEC 62198 NOTE Harmonized as EN 62198.
- 3 - EN 62741:2015
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 60050-192 - International electrotechnical vocabulary - - -
Part 192: Dependability
IEC 60300-1 - Dependability management -- EN 60300-1 -
Part 1: Guidance for management and
application
ISO 31000 - Risk management - Principles and - -
guidelines
IEC 62741 ®
Edition 1.0 2015-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Demonstration of dependability requirements – The dependability case
Démonstration des exigences de sûreté de fonctionnement – Argumentaire
dans le cadre de la sûreté de fonctionnement
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 03.120.01; 21.020 ISBN 978-2-8322-2247-8
– 2 – IEC 62741:2015 © IEC 2015
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviations . 7
3.1 Terms and definitions . 7
3.2 Abbreviations . 8
4 Background to the dependability case . 8
4.1 Principles and purpose . 8
4.2 Relationship between the dependability case and dependability plans . 9
4.3 Progressive assurance of dependability . 10
5 Principles of the dependability case . 11
5.1 Description of the dependability case . 11
5.2 Making claims in the dependability case . 12
5.3 Using evidence in the dependability case . 13
5.4 Evidence framework . 14
5.5 Dependability case report . 16
6 Development of the dependability case . 16
6.1 General . 16
6.2 Preparation of the dependability case . 17
6.3 Concept stage . 18
6.4 Development stage . 19
6.5 Realization stage . 19
6.6 Utilization stage . 20
6.7 Enhancement stage . 20
6.8 Retirement stage . 20
7 Assessing the adequacy of evidence . 21
Annex A (informative) Evidence framework . 22
A.1 General . 22
A.2 Abbreviations used only in this annex . 23
Annex B (informative) General requirements for the dependability case report . 40
B.1 General . 40
B.2 Elements required for the dependability case report . 40
B.3 Context and assumptions . 40
B.3.1 Stakeholders . 40
B.3.2 System description . 41
B.3.3 Dependability requirements . 41
B.3.4 Limitations on use . 41
B.3.5 Assumptions . 41
B.4 Risks . 41
B.5 Dependability plan . 42
B.6 The evidence framework . 42
B.7 Body of evidence . 42
B.8 Review of evidence to date . 42
B.9 Dependability claims and argument . 42
IEC 62741:2015 © IEC 2015 – 3 –
B.10 Conclusions and recommendations . 42
Annex C (informative) Checklist of points for assessing the adequacy of evidence . 44
Bibliography . 45
Figure 1 – Illustration of progressive assurance process . 11
Figure 2 – The development of claims . 12
Figure 3 – Establishment and development of the evidence framework . 15
Table A.1 – Evidence framework for system “X” . 24
Table A.2 – Evidence framework for system Y . 28
– 4 – IEC 62741:2015 © IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
______________
DEMONSTRATION OF DEPENDABILITY REQUIREMENTS –
THE DEPENDABILITY CASE
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote
...
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