IEC 61069-7:2016

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

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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

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
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