SIST EN 61069-2:2017

SLOVENSKI STANDARD
SIST EN 61069-2:2017
01-marec-2017
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SIST EN 61069-2:1998
Meritve, krmiljenje in avtomatizacija v industrijskih procesih - Ocenjevanje
lastnosti sistema zaradi njegovega vrednotenja - 2. del: Metodologija vrednotenja
(IEC 61069-2:2016)
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Mesure, commande et automation dans les processus industriels - Appréciation des
propriétés d'un système en vue de son évaluation - Partie 2: Méthodologie à appliquer
pour l'évaluation (IEC 61069-2:2016)
Ta slovenski standard je istoveten z: EN 61069-2:2016
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.240.50 Uporabniške rešitve IT v IT applications in industry
industriji
SIST EN 61069-2:2017 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61069-2:2017

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SIST EN 61069-2:2017


EUROPEAN STANDARD EN 61069-2

NORME EUROPÉENNE

EUROPÄISCHE NORM
October 2016
ICS 25.040.40 Supersedes EN 61069-2:1994
English Version
Industrial-process measurement, control and automation -
Evaluation of system properties for the purpose of system
assessment - Part 2: Assessment methodology
(IEC 61069-2:2016)
Mesure, commande et automation dans les processus Leittechnik für industrielle Prozesse - Ermittlung der
industriels - Appréciation des propriétés d'un système en Systemeigenschaften zum Zweck der Eignungsbeurteilung
vue de son évaluation - Partie 2: Méthodologie à appliquer eines Systems - Teil 2: Methodik der Eignungsbeurteilung
pour l'évaluation (IEC 61069-2:2016)
(IEC 61069-2:2016)
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 61069-2:2016 E

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SIST EN 61069-2:2017
EN 61069-2:2016
European foreword
The text of document 65A/790/FDIS, future edition 2 of IEC 61069-2, 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 61069-2:2016.

The following dates are fixed:
(dop) 2017-04-28
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2019-10-28
standards conflicting with the
document have to be withdrawn

This document supersedes EN 61069-2:1994.

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 61069-2:2016 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/TS 62603-1:2014 NOTE Harmonized as CLC/TS 62603-1:2014.
IEC 60584-1:2013 NOTE Harmonized as EN 60584-1:2013 (not modified).
IEC 61069-4 NOTE Harmonized as EN 61069-4.
IEC 61709 NOTE Harmonized as EN 61709.
ISO 9001:2015 NOTE Harmonized as EN ISO 9001:2015.
2

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SIST EN 61069-2:2017
EN 61069-2:2016
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 61069-1 2016 Industrial-process measurement, control EN 61069-1 2016
and automation - Evaluation of system
properties for the purpose of system
assessment -
Part 1: Terminology and basic concepts

3

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SIST EN 61069-2:2017

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SIST EN 61069-2:2017




IEC 61069-2

®


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 2: Assessment methodology




Mesure, commande et automation dans les processus industriels – Appréciation

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


Partie 2: Méthodologie à appliquer pour l'évaluation













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 25.040.40 ISBN 978-2-8322-3410-5



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 61069-2:2017
– 2 – IEC 61069-2:2016 © IEC 2016
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 8
2 Normative references. 8
3 Terms, definitions, abbreviated terms, acronyms, conventions and symbols . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms, acronyms, conventions and symbols . 8
4 Assessment approach . 8
5 Assessment method . 9
5.1 Overview. 9
5.1.1 General . 9
5.1.2 Phases . 9
5.2 Defining the objectives of the assessment . 10
5.3 Design and layout of the assessment . 11
5.3.1 Defining the scope of assessment . 11
5.3.2 System properties and influencing factors . 11
5.3.3 Collation of documented information . 13
5.3.4 Documenting collated information . 14
5.3.5 Selecting assessment items . 14
5.3.6 Assessment specification . 14
5.4 Planning of the assessment program . 14
5.4.1 Overview . 14
5.4.2 Developing assessment activities . 15
5.4.3 Assessment program . 16
5.5 Execution of the assessment . 16
5.6 Reporting of the assessment . 16
6 Evaluation techniques . 17
Annex A (informative) System Requirements Document (SRD) . 18
A.1 Overview. 18
A.2 Analysis of system mission . 18
A.2.1 General . 18
A.2.2 Formulation of system mission . 18
A.2.3 Analysis of system mission into tasks . 18
A.2.4 Assignment of relative importance to tasks . 19
A.2.5 Defining influencing factors . 19
A.3 Review of system requirements document (SRD) . 19
Annex B (informative) System Specification Document (SSD) . 20
B.1 Overview. 20
B.2 Development of system specification document . 20
B.2.1 General . 20
B.2.2 System overview . 20
B.2.3 Defining system boundaries . 21
B.2.4 Specification of system . 21
B.2.5 Description of system operation . 21
B.2.6 Statement of system implementation rationale . 22

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SIST EN 61069-2:2017
IEC 61069-2:2016 © IEC 2016 – 3 –
B.2.7 Statement of compliance with system requirements . 22
Annex C (informative) Examples of collation documentation . 23
C.1 Overview. 23
C.2 Example of furnace control documentation . 23
C.2.1 Schematic of task . 23
C.2.2 Task definition . 23
C.2.3 Input characteristics . 23
C.2.4 Output characteristics . 24
C.2.5 Operational functions . 25
C.2.6 Monitoring functions . 25
C.2.7 Configuration . 25
C.2.8 Flexibility . 25
C.2.9 Functionality collation tables . 26
C.3 Example of simple control loop task documentation. 32
C.3.1 Overview . 32
C.3.2 Schematic of task . 32
C.3.3 Information flows . 32
C.3.4 Performance tables . 32
C.3.5 Performance collation tables . 33
C.4 Example of collation documentation (from SRD of a master-slave control
task) . 35
C.4.1 Overview . 35
C.4.2 Schematic of task . 35
C.4.3 Boundary states . 35
C.5 Example of collation documentation (from SSD of a master-slave control
task) . 36
Bibliography . 38

Figure 1 – General layout of IEC 61069 . 7
Figure 2 – Assessment matrix . 12
Figure C.1 – Control block . 23
Figure C.2 – Task schematic . 32
Figure C.3 – Schematic of task . 35

Table 1 – Assessment phases, inputs and outputs . 10
Table C.1 – SRD coverage analysis . 26
Table C.2 – SRD configurability analysis . 28
Table C.3 – SRD flexibility analysis . 30
Table C.4 – Performance for information flow . 32
Table C.5 – Information translation . 33
Table C.6 – Performance collation . 34
Table C.7 – Failure states of task input and output . 36
Table C.8 – Dependability . 37

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SIST EN 61069-2:2017
– 4 – IEC 61069-2:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

INDUSTRIAL-PROCESS MEASUREMENT, CONTROL AND AUTOMATION –
EVALUATION OF SYSTEM PROPERTIES
FOR THE PURPOSE OF SYSTEM ASSESSMENT –

Part 2: Assessment methodology

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-
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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
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
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 61069-2 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 1993. 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 61069-2:1993 to make the overall set of standards
more organized and consistent;
b) IEC TS 62603-1:2014 has been incorporated into this edition.

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SIST EN 61069-2:2017
IEC 61069-2:2016 © IEC 2016 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
65A/790/FDIS 65A/799/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.

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SIST EN 61069-2:2017
– 6 – IEC 61069-2:2016 © IEC 2016
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 particular 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, the standard 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 may 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, e.g., 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 part structure and the relationship among the parts of IEC 61069 are shown in Figure 1.

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SIST EN 61069-2:2017
IEC 61069-2:2016 © IEC 2016 – 7 –

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

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SIST EN 61069-2:2017
– 8 – IEC 61069-2:2016 © IEC 2016
INDUSTRIAL-PROCESS MEASUREMENT, CONTROL AND AUTOMATION –
EVALUATION OF SYSTEM PROPERTIES
FOR THE PURPOSE OF SYSTEM ASSESSMENT –

Part 2: Assessment methodology



1 Scope
This part of IEC 61069 specifies the methodology in the assessment of a basic control system
(BCS) based on the basic concepts of IEC 61069-1.
It describes the method for analysing, weighing the relative importance of the various system
properties and influencing factors, and determining an assessment program.
2 Normative references
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.
1
IEC 61069-1:— , Industrial-process measurement, control and automation – Evaluation of
system properties for the purpose of system assessment – Part 1: Terminology and basic
concepts
3 Terms, definitions, abbreviated terms, acronyms, conventions and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61069-1 apply.
3.2 Abbreviated terms, acronyms, conventions and symbols
For the purposes of this document, the abbreviated terms, acronyms, conventions and
symbols given in IEC 61069-1 apply.
4 Assessment approach
BCSs are sufficiently complex, so that a totally comprehensive assessment inevitably requires
an expenditure of effort and time that is neither practical nor cost-effective. It is therefore
important to analyse and specify the objectives of the assessment carefully, before an
assessment program is planned.
The mission of the system or class of missions is broken down into tasks.
The task(s) which the system needs to perform should be defined in terms of the selected
BCS, its system properties, and the required functions. This enables the functions required for
the system to fulfil its mission(s) to be specified precisely.
__________
1
 Second edition to be published simultaneously with this part of IEC 61069.

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SIST EN 61069-2:2017
IEC 61069-2:2016 © IEC 2016 – 9 –
Missions of the system usually require some characteristics of the system which are not
directly related to the tasks of the system. Such characteristics include documentation and
support services.
The assessment program shall be designed with the assessment objectives, the system
requirements and the system specifications. It should be prepared in advance.
NOTE In certain cases, e.g. a regulated application, it may be necessary that the assessment be designed and
performed by an independent party.
In the absence of a mission, no assessment can be made; however, examination of the
system to gather and organize data for a later assessment is possible.
5 Assessment method
5.1 Overview
5.1.1 General
The details of the assessment program shall be derived from consideration of the assessment
objectives (as stated in 5.2) and the following inputs:
– System Requirements Document (SRD), and
– System Specification Document (SSD).
NOTE 1 Systems Requirements Document is explained in Annex A.
NOTE 2 System Specification Document is explained in Annex B.
Th
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