ISO 26262-3:2018

Road vehicles — Functional safety — Part 3: Concept phase

This document is intended to be applied to safety-related systems that include one or more electrical and/or electronic (E/E) systems and that are installed in series production road vehicles, excluding mopeds. This document does not address unique E/E systems in special vehicles such as E/E systems designed for drivers with disabilities. NOTE Other dedicated application-specific safety standards exist and can complement the ISO 26262 series of standards or vice versa. Systems and their components released for production, or systems and their components already under development prior to the publication date of this document, are exempted from the scope of this edition. This document addresses alterations to existing systems and their components released for production prior to the publication of this document by tailoring the safety lifecycle depending on the alteration. This document addresses integration of existing systems not developed according to this document and systems developed according to this document by tailoring the safety lifecycle. This document addresses possible hazards caused by malfunctioning behaviour of safety-related E/E systems, including interaction of these systems. It does not address hazards related to electric shock, fire, smoke, heat, radiation, toxicity, flammability, reactivity, corrosion, release of energy and similar hazards, unless directly caused by malfunctioning behaviour of safety-related E/E systems. This document describes a framework for functional safety to assist the development of safety-related E/E systems. This framework is intended to be used to integrate functional safety activities into a company-specific development framework. Some requirements have a clear technical focus to implement functional safety into a product; others address the development process and can therefore be seen as process requirements in order to demonstrate the capability of an organization with respect to functional safety. This document does not address the nominal performance of E/E systems. This document specifies the requirements for the concept phase for automotive applications, including the following: — item definition; — hazard analysis and risk assessment; and — functional safety concept. Annex A provides an overview on objectives, prerequisites and work products of this document.

Véhicules routiers — Sécurité fonctionnelle — Partie 3: Phase de projet

General Information

• Status: Published
• Publication Date: 16-Dec-2018
• ICS: 43.040.10 - Electrical and electronic equipment
• Technical Committee: ISO/TC 22/SC 32 - Electrical and electronic components and general system aspects
• Drafting Committee: ISO/TC 22/SC 32/WG 8 - Functional safety
• Current Stage: 9092 - International Standard to be revised
• Completion Date: 08-Jul-2024

Relations

• Revises: ISO 26262-3:2011 - Road vehicles — Functional safety — Part 3: Concept phase
• Effective Date: 05-Nov-2015

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 26262-3
Second edition
2018-12
Road vehicles — Functional safety —
Part 3:
Concept phase
Véhicules routiers — Sécurité fonctionnelle —
Partie 3: Phase de projet
Reference number
©
ISO 2018
© ISO 2018
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ii © ISO 2018 – All rights reserved

Contents Page
Foreword .iv
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Requirements for compliance . 2
4.1 Purpose . 2
4.2 General requirements . 2
4.3 Interpretations of tables . 3
4.4 ASIL-dependent requirements and recommendations . 3
4.5 Adaptation for motorcycles . 3
4.6 Adaptation for trucks, buses, trailers and semi-trailers. 3
5 Item definition . 4
5.1 Objectives. 4
5.2 General . 4
5.3 Inputs to this clause . 4
5.3.1 Prerequisites . 4
5.3.2 Further supporting information . 4
5.4 Requirements and recommendations . 4
5.5 Work products . 5
6 Hazard analysis and risk assessment . 5
6.1 Objectives. 5
6.2 General . 5
6.3 Inputs to this clause . 6
6.3.1 Prerequisites . 6
6.3.2 Further supporting information . 6
6.4 Requirements and recommendations . 6
6.4.1 Initiation of the hazard analysis and risk assessment . 6
6.4.2 Situation analysis and hazard identification. 6
6.4.3 Classification of hazardous events . 7
6.4.4 Determination of safety goals .10
6.4.5 Management of variances of T&B in hazard analysis and risk assessment .11
6.4.6 Verification .12
6.5 Work products .12
7 Functional safety concept.12
7.1 Objectives.12
7.2 General .13
7.3 Inputs to this clause .13
7.3.1 Prerequisites .13
7.3.2 Further supporting information .13
7.4 Requirements and recommendations .14
7.4.1 General.14
7.4.2 Derivation of functional safety requirements .14
7.4.3 Safety validation criteria .16
7.4.4 Verification of the functional safety concept .16
7.5 Work products .17
Annex A (informative) Overview of and workflow of concept phase .18
Annex B (informative) Hazard analysis and risk assessment.19
Bibliography .28
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
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on the ISO list of patent declarations received (see www .iso .org/patents).
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expressions related to conformity assessment, as well as information about ISO's adherence to the
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URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 32,
Electrical and electronic components and general system aspects.
This edition of ISO 26262 series of standards cancels and replaces the edition ISO 26262:2011 series of
standards, which has been technically revised and includes the following main changes:
— requirements for trucks, buses, trailers and semi-trailers;
— extension of the vocabulary;
— more detailed objectives;
— objective oriented confirmation measures;
— management of safety anomalies;
— references to cyber-security;
— updated target values for hardware architecture metrics;
— guidance on model based development and software safety analysis;
— evaluation of hardware elements;
— additional guidance on dependent failure analysis;
— guidance on fault tolerance, safety related special characteristics and software tools;
— guidance for semiconductors;
— requirements for motorcycles; and
— general restructuring of all parts for improved clarity.
iv © ISO 2018 – All rights reserved

Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
A list of all parts in the ISO 26262 series can be found on the ISO website.
Introduction
The ISO 26262 series of standards is the adaptation of IEC 61508 series of standards to address the
sector specific needs of electrical and/or electronic (E/E) systems within road vehicles.
This adaptation applies to all activities during the safety lifecycle of safety-related systems comprised
of electrical, electronic and software components.
Safety is one of the key issues in the development of road vehicles. Development and integration of
automotive functionalities strengthen the need for functional safety and the need to provide evidence
that functional safety objectives are satisfied.
With the trend of increasing technological complexity, software content and mechatronic
implementation, there are increasing risks from systematic failures and random hardware failures,
these being considered within the scope of functional safety. ISO 26262 series of standards includes
guidance to mitigate these risks by providing appropriate requirements and processes.
To achieve functional safety, the ISO 26262 series of standards:
a) provides a reference for the automotive safety lifecycle and supports the tailoring of the activities
to be performed during the lifecycle phases, i.e.
...