EN 61069-7:2016

SLOVENSKI STANDARD
01-marec-2017
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SIST EN 61069-7:2001
Meritve, krmiljenje in avtomatizacija v industrijskih procesih - Ocenjevanje
lastnosti sistema zaradi njegovega vrednotenja - 7. del: Vrednotenje sistema za
varnost tveganja (IEC 61069-7:2016)
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Leittechnik für industrielle Prozesse - Ermittlung der Systemeigenschaften zum Zweck
der Eignungsbeurteilung eines Systems - Teil 7: Eignungsbeurteilung der Sicherheit
eines Systems (IEC 61069-7:2016)
Mesure, commande et automation dans les processus industriels - Appréciation des
propriétés d'un sytème en vue de son évaluation - Partie 7: Evaluation de la sécurité d'un
système (IEC 61069-7:2016)
Ta slovenski standard je istoveten z: EN 61069-7:2016
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61069-7
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2016
ICS 25.040.40 Supersedes EN 61069-7:1999
English Version
Industrial-process measurement, control and automation -
Evaluation of system properties for the purpose of system
assessment - Part 7: Assessment of system safety
(IEC 61069-7:2016)
Mesure, commande et automation dans les processus Leittechnik für industrielle Prozesse - Ermittlung der
industriels - Appréciation des propriétés d'un sytème en vue Systemeigenschaften zum Zweck der Eignungsbeurteilung
de son évaluation - Partie 7: Evaluation de la sécurité d'un eines Systems - Teil 7: Eignungsbeurteilung der Sicherheit
système eines Systems
(IEC 61069-7:2016) (IEC 61069-7:2016)
This European Standard was approved by CENELEC on 2016-07-20. 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
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61069-7:2016 E
European foreword
The text of document 65A/795/FDIS, future edition 2 of IEC 61069-7, prepared by SC 65A "System
aspects", of IEC/TC 65 "Industrial-process measurement, control and automation" was submitted to
the IEC-CENELEC parallel vote and approved by CENELEC as EN 61069-7:2016.
The following dates are fixed:
(dop) 2017-04-20
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
(dow) 2019-07-20
• latest date by which the national standards conflicting with
the document have to be withdrawn

This document supersedes EN 61069-7:1999.
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 61069-7:2016 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 60243 NOTE Harmonized in EN 60243 series.
IEC 60529 NOTE Harmonized as EN 60529.
IEC 60695-2 NOTE Harmonized in EN 60695-2 series.
IEC 60664-1 NOTE Harmonized as EN 60664-1.
IEC 60695-11-10 NOTE Harmonized as EN 60695-11-10.
IEC 60695-11-20 NOTE Harmonized as EN 60695-11-20.
IEC 60825-1 NOTE Harmonized as EN 60825-1.
IEC 61010-1:2010 NOTE Harmonized as EN 61010-1:2010 (not modified).
IEC 61069-3 NOTE Harmonized as EN 61069-3.
IEC 61069-4 NOTE Harmonized as EN 61069-4.
IEC 61069-5:2016 NOTE Harmonized as EN 61069-5:2016 (not modified).
IEC 61069-6:2016 NOTE Harmonized as EN 61069-6:2016 (not modified).
IEC 61069-8 NOTE Harmonized as EN 61069-8.
IEC 61508 NOTE Harmonized in EN 61508 series.
IEC/TS 62603-1 NOTE Harmonized as CLC/TS 62603-1.
CISPR 22 NOTE Harmonized as EN 55022.
ISO 31010:2009 NOTE Harmonized as EN 31010:2010 (not modified).

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
1)
IEC 61069-1 2016 Industrial-process measurement, control EN 61069-1 201X
and automation - Evaluation of system
properties for the purpose of system
assessment -
Part 1: Terminology and basic concepts
1)
IEC 61069-2 2016 Industrial-process measurement, control EN 61069-2 201X
and automation - Evaluation of system
properties for the purpose of system
assessment -
Part 2: Assessment methodology

1) To be published.
IEC 61069-7 ®
Edition 2.0 2016-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial-process measurement, control and automation – Evaluation of system

properties for the purpose of system assessment –

Part 7: Assessment of system safety

Mesure, commande et automation dans les processus industriels – Appréciation

des propriétés d'un système en vue de son évaluation –

Partie 7: Évaluation de la sécurité d'un système

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40 ISBN 978-2-8322-3450-1

– 2 – IEC 61069-7:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 7
2 Normative references. 7
3 Terms, definitions, abbreviated terms, acronyms, conventions and symbols . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms, acronyms, conventions and symbols . 7
4 Basis of assessment specific to safety . 8
4.1 System safety properties . 8
4.1.1 General . 8
4.1.2 Hazard reduction . 9
4.1.3 Hazard isolation . 9
4.1.4 Immunity / robustness . 9
4.1.5 Aversion . 9
4.1.6 Mitigation . 9
4.2 Factors influencing system safety . 9
4.3 Hazards, harms and propagation paths . 9
4.3.1 Kinds of hazards . 9
4.3.2 Receivers of harms . 11
4.3.3 Propagation paths . 12
5 Assessment method . 12
5.1 General . 12
5.2 Defining the objective of the assessment . 12
5.3 Design and layout of the assessment . 13
5.4 Planning of the assessment program . 13
5.5 Execution of the assessment . 13
5.6 Reporting of the assessment . 13
6 Evaluation techniques . 14
6.1 General . 14
6.2 Analytical evaluation techniques . 14
6.3 Empirical evaluation techniques. 14
6.4 Additional topics for evaluation techniques . 14
Annex A (informative) Check list and/or example of SRD for system functionality . 15
Annex B (informative) Checklist and/or example of SSD for system functionality . 16
B.1 SSD information . 16
B.2 Check points for system safety . 16
Bibliography . 17

Figure 1 – General layout of IEC 61069 . 6
Figure 2 – System safety . 8

IEC 61069-7:2016 © IEC 2016 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL-PROCESS MEASUREMENT, CONTROL AND AUTOMATION –
EVALUATION OF SYSTEM PROPERTIES FOR
THE PURPOSE OF SYSTEM ASSESSMENT –

Part 7: Assessment of system safety

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
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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 clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
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members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61069-7 has been prepared by subcommittee 65A: System
aspects, of IEC technical committee 65: Industrial-process measurement, control and
automation.
This second edition cancels and replaces the first edition published in 1999. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) reorganization of the material of IEC 61069-7:1999 to make the overall set of standards
more organized and consistent;
b) IEC TS 62603-1 has been incorporated into this edition.

– 4 – IEC 61069-7:2016 © IEC 2016
The text of this standard is based on the following documents:
FDIS Report on voting
65A/795/FDIS 65A/805/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 61069 series, published under the general title Industrial-process
measurement, control and automation – Evaluation of system properties for the purpose of
system assessment, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
IEC 61069-7:2016 © IEC 2016 – 5 –
INTRODUCTION
IEC 61069 deals with the method which should be used to assess system properties of a
basic control system (BCS). IEC 61069 consists of the following parts.
Part 1: Terminology and basic concepts
Part 2: Assessment methodology
Part 3: Assessment of system functionality
Part 4: Assessment of system performance
Part 5: Assessment of system dependability
Part 6: Assessment of system operability
Part 7: Assessment of system safety
Part 8: Assessment of other system properties
Assessment of a system is the judgement, based on evidence, of the suitability of the system
for a specific mission or class of missions.
To obtain total evidence would require complete evaluation (for example under all influencing
factors) of all system properties relevant to the specific mission or class of missions.
Since this is rarely practical, the rationale on which an assessment of a system should be
based is:
– the identification of the importance of each of the relevant system properties,
– the planning for evaluation of the relevant system properties with a cost-effective
dedication of effort to the various system properties.
In conducting an assessment of a system, it is crucial to bear in mind the need to gain a
maximum increase in confidence in the suitability of a system within practical cost and time
constraints.
An assessment can only be carried out if a mission has been stated (or given), or if any
mission can be hypothesized. In the absence of a mission, no assessment can be made;
however, evaluations can still be specified and carried out for use in assessments performed
by others. In such cases, IEC 61069 can be used as a guide for planning an evaluation and it
provides methods for performing evaluations, since evaluations are an integral part of
assessment.
In preparing the assessment, it can be discovered that the definition of the system is too
narrow. For example, a facility with two or more revisions of the control systems sharing
resources, for example a network, should consider issues of co-existence and inter-operability.
In this case, the system to be investigated should not be limited to the “new” BCS; it should
include both. That is, it should change the boundaries of the system to include enough of the
other system to address these concerns.
The series structure and the relationship among the parts of IEC 61069 are shown in Figure 1.

– 6 – IEC 61069-7:2016 © IEC 2016

IEC 61069: Industrial-process measurement, control and automation –
Evaluation of system properties for the purpose of system assessment
Part 1: Terminology and basic concepts
• Basic concept
• Terminology ‐ Objective
‐ Description of system
‐ Common terms
‐ Terms for particular part
‐ System properties
‐ Influencing factors
Part 2: Assessment methodology
• Generic requirements of procedure of assessment
‐ Overview, approach and phases
‐ Requirements for each phase
‐ General description of evaluation techniques
Parts 3 to 8: Assessment of each system property
• Basics of assessment specific to each property
‐ Properties and influencing factors
• Assessment method for each property
• Evaluation techniques for each property

IEC
Figure 1 – General layout of IEC 61069

IEC 61069-7:2016 © IEC 2016 – 7 –
INDUSTRIAL-PROCESS MEASUREMENT, CONTROL AND AUTOMATION –
EVALUATION OF SYSTEM PROPERTIES FOR
THE PURPOSE OF SYSTEM ASSESSMENT –

Part 7: Assessment of system safety

1 Scope
This part of IEC 61069:
– specifies the detailed method of the assessment of system safety of a basic control
system (BCS) based on the basic concepts of IEC 61069-1 and methodology of
IEC 61069-2,
– defines basic categorization of system safety properties,
– describes the factors that influence system safety and which need to be taken into account
when evaluating system safety, and
– provides guidance in selecting techniques from a set of options (with references) for
evaluating the system safety.
The treatment of safety in this standard is confined to hazards that can be present within the
BCS itself. That is, the BCS itself as a physical entity will not impose a hazard.
Considerations
...