FprEN IEC 62508:2024
(Main)Guidance on human aspects of dependability
Guidance on human aspects of dependability
IEC 62508: 2025 provides guidance on current knowledge and practice concerning dependability in an operational environment, in terms of the humans, teams and organizations involved in conducting the work. It is part of a suite of IEC standards that are intended to address the dependability of both the technical and human elements of equipment and organizations. This document describes the human elements of a typical operational system, and the importance of those elements to overall dependability. It also describes the means of assessing how well these elements are functioning, and general concepts on how the reliability of humans can be improved. These elements typically include the individual workers, the groups or teams into which they are organized, the interfaces between humans and technical systems, and the overall organization. The following guidance is applicable to any industry that depends on human-systems interactions involving the technology, software, or systems of work required to support the production and safety objectives of an organization. This document primarily addresses complex technical systems, but some parts are also applicable to the manufacturing of industrial and consumer products. Principles for design of the human-machine interface (usability) are described, and further information can be found in the technical literature and in relevant product standards. Although this document does not specifically cover worker health or safety, the application of this document can raise related issues, particularly in process safety, which is closely associated with system reliability. This second edition cancels and replaces the first edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) The emphasis on user-centred design in the previous edition was reduced in favour of a greater emphasis on human dependability in an existing operational environment. b) The emphasis on human error and error-rate determination methods was reduced in favour of a greater emphasis on means of providing organizational support for the workforce in their execution of required tasks. c) Where appropriate, discussions of human factors in an operational environment were aligned with current theory, terminology and practice.
Leitlinien zu den menschlichen Aspekten der Zuverlässigkeit
Lignes directrices relatives aux facteurs humains dans la sûreté de fonctionnement
L'IEC 62508: 2025 fournit des recommandations concernant les connaissances et pratiques actuelles en matière de sûreté de fonctionnement dans un environnement opérationnel, par rapport aux êtres humains, aux équipes et aux organisations impliquées dans l'exécution du travail. Il fait partie d'une série de normes IEC destinées à traiter de la sûreté de fonctionnement des éléments techniques et humains des équipements et des organisations. Le présent document décrit les éléments humains d'un système opérationnel type et l'importance de ces éléments pour la sûreté de fonctionnement globale. Il décrit également les moyens d'évaluer le bon fonctionnement de ces éléments, ainsi que des concepts généraux sur la manière dont la fiabilité humaine peut être améliorée. Ces éléments comprennent généralement les différents travailleurs, les groupes et équipes au sein desquels ils sont répartis, les interfaces entre les êtres humains et les systèmes techniques, et l'organisation globale. Les recommandations suivantes s'appliquent à toute industrie qui dépend des interactions homme-système impliquant la technologie, les logiciels ou les systèmes de travail nécessaires pour soutenir les objectifs de production et de sécurité d'une organisation. Le présent document concerne principalement les systèmes techniques complexes, mais certaines parties s'appliquent également à la fabrication de produits industriels et de consommation. Les principes de conception de l'interface homme-machine (utilisabilité) sont décrits, et des informations complémentaires peuvent être obtenues dans la documentation technique et dans les normes de produits pertinentes. La santé et la sécurité des travailleurs ne sont pas spécifiquement couvertes par le présent document, mais son application peut soulever des questions connexes, notamment en ce qui concerne la sécurité des processus, qui est étroitement liée à la fiabilité des systèmes. Cette deuxième édition annule et remplace la première édition parue en 2010. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) l'accent mis sur la conception centrée sur l'utilisateur dans l'édition précédente a été réduit au profit d'une plus grande importance accordée aux facteurs humains de la sûreté de fonctionnement dans un environnement opérationnel existant; b) l'accent mis sur l'erreur humaine et les méthodes de détermination du taux d'erreur a été réduit au profit d'une plus grande importance accordée aux moyens de fournir un soutien organisationnel au personnel dans l'exécution des tâches exigées; c) le cas échéant, les discussions sur les facteurs humains dans un environnement opérationnel ont été alignées sur la théorie, la terminologie et la pratique actuelles.
Napotki o človeških vidikih zanesljivosti
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN IEC 62508:2024
01-marec-2024
Napotki o človeških vidikih zanesljivosti
Guidance on human aspects of dependability
Leitlinien zu den menschlichen Aspekten der Zuverlässigkeit
Lignes directrices relatives aux facteurs humains dans la sûreté de fonctionnement
Ta slovenski standard je istoveten z: prEN IEC 62508:2024
ICS:
03.120.01 Kakovost na splošno Quality in general
oSIST prEN IEC 62508:2024 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN IEC 62508:2024
oSIST prEN IEC 62508:2024
56/2030/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62508 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-01-19 2024-04-12
SUPERSEDES DOCUMENTS:
56/1955/CD, 56/1991B/CC
IEC TC 56 : DEPENDABILITY
SECRETARIAT: SECRETARY:
United Kingdom Ms Stephanie Lavy
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Guidance on human aspects of dependability
PROPOSED STABILITY DATE: 2025
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.
oSIST prEN IEC 62508:2024
– 2 – IEC CDV 62508 © IEC:2023
1 CONTENTS
3 FOREWORD . 5
4 INTRODUCTION . 7
5 1 Scope . 8
6 2 Normative references . 8
7 3 Terms and definitions and abbreviations . 8
8 3.1 Terms and definitions. 8
9 3.2 Abbreviated terms . 11
10 4 Dependability elements of a socio-technical system . 11
11 4.1 Overview . 11
12 4.2 Task element . 13
13 4.3 Human element . 13
14 4.3.1 Role of Humans in a System . 13
15 4.3.2 Dependability characteristics of humans . 14
16 4.4 Machine element. 15
17 4.5 Organization and team elements . 15
18 4.5.1 Overview . 15
19 4.5.2 Teamwork/operational environment . 15
20 4.5.3 Organizational environment and structure . 16
21 4.5.4 Physical environment . 16
22 4.5.5 Cultural environment . 16
23 4.6 Feedback within the socio-technical system . 16
24 5 Human factors influence on dependability . 17
25 5.1 Overview . 17
26 5.2 Influence of the human element on dependability . 18
27 5.2.1 Overview . 18
28 5.2.2 Human strengths and limitations in an operational environment . 18
29 5.2.3 Performance shaping factors (human factors) . 19
30 5.2.4 External human factors . 20
31 5.2.5 Internal human factors . 20
32 5.2.6 Information Processing . 20
33 5.3 Influence of the machine element on dependability . 21
34 5.4 Influence of the task element on dependability . 21
35 5.4.1 General . 21
36 5.4.2 Allocation of tasks to humans vs. machines to optimize dependability . 21
37 6 Human dependability program: Identifying the steps to improve human
38 dependability . 22
39 6.1 Introduction . 22
40 6.2 Analysing dependability failures to define countermeasures . 22
41 6.2.1 Overview . 22
42 6.2.2 Human failures . 22
43 6.2.3 Machine failures . 24
44 6.2.4 Human- System interaction failures . 24
45 6.3 Analysis of dependability data . 24
46 6.4 Improving human dependability . 25
47 6.4.1 Minimizing risk due to human-related failures . 25
oSIST prEN IEC 62508:2024
IEC CDV 62508 © IEC:2023 – 3 –
48 6.4.2 Human decision-making. 25
49 6.5 Improving machine dependability through a human factors approach . 26
50 6.6 Improving socio-technical system dependability . 26
51 7 Human dependability at each life-cycle stage . 27
52 7.1 Overview of human dependability aspects of life cycle stages . 27
53 7.2 Concept/Definition stage . 27
54 7.2.1 Concept stage . 27
55 7.2.2 Human-centred design planning . 28
56 7.2.3 System requirements . 28
57 7.2.4 Human-centred design requirements . 28
58 7.3 Design and development stage . 29
59 7.3.2 Human-centred design guidelines . 29
60 7.3.3 Human-centred design activities . 30
61 7.3.5 Human dependability analysis in design and development . 31
62 7.4 Realization/implementation stage . 32
63 7.5 Operations and maintenance stage . 32
64 7.6 Enhancement stage . 33
65 7.7 Retirement/decommissioning stage . 33
66 Annex A (informative) Examples of Human Reliability Analysis (HRA) methods . 34
67 Annex B (informative) Summary of human-oriented design activities and their impact
68 on system dependability . 39
69 B.1 Overview . 39
70 B.2 Automation . 39
71 B.3 Design for maintainability . 39
72 B.4 Human-machine interface . 40
73 B.5 Incorporation of displays, controls, and alarm functions . 40
74 B.6 Incorporation of input devices . 41
75 B.7 Environment . 41
76 B.8 Safety . 41
77 B.9 Security . 41
78 Annex C (informative) Best practices for human-centred design. 42
79 Bibliography . 47
81 Figure 1 – Components and interaction of a socio-technical system . 12
82 Figure 2 – Performance shaping factors (PSFs) that can influence human dependability . 20
83 Figure 3 – Model of typical human information processing . 21
84 Figure 4 – Hierarchy of human failures . 23
85 Figure 5 – System life cycle . 27
86 Figure 6 – Human-centred design activities . 31
88 Table 1 – People who influence dependability . 14
89 Table A.1 – HRA methods and their application . 34
90 Table B.1 – Automation . 39
91 Table B.2 – Design for maintainability . 39
92 Table B.3 – Human-machine interface . 40
93 Table B.4 –Incorporation of displays, controls, and alarm functions . 40
94 Table B.5 – Incorporation of input devices . 41
oSIST prEN IEC 62508:2024
– 4 – IEC CDV 62508 © IEC:2023
95 Table B.6 – Environment . 41
96 Table B.7 – Safety . 41
97 Table B.8 – Security . 41
98 Table C.1 – Examples of methods and techniques that contribute to best practices . 42
oSIST prEN IEC 62508:2024
IEC CDV 62508 © IEC:2023 – 5 –
102 INTERNATIONAL ELECTROTECHNICAL COMMISSION
103 ____________
105 GUIDANCE ON HUMAN ASPECTS OF DEPENDABILITY
108 FOREWORD
109 1) The International Electrotechnical Commission (IEC) is a worldwide organization for
110 standardization comprising all national electrotechnical committees (IEC National
111 Committees). The object of IEC is to promote international co-operation on all questions
112 concerning standardization in the electrical and electronic fields. To this end and in addition
113 to other activities, IE
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.