ISO/DPAS 8926

Road vehicles – Functional safety - Use of pre-existing software architectural elements

This document describes a framework for Functional Safety to assist the development of safety-related systems incorporating existing software products not developed in accordance with international safety standards, like ISO 26262. This framework provides possible methods and measures that can be adopted to claim that the software product is sufficiently safe once embedded within a system-on-chip and indications for creating a complete Technical Safety Concept. These indications address technical aspects to implement functional safety in order to demonstrate the architectural capability of a generic software product in the context of the overall safety-related system; others address the software development process to demonstrate the robustness against systematic failures. This document provides a detailed and exhaustive qualification concept applicable for generic complex pre-existing SW product with the aim of achieving equivalence safety assurance with the principles underlying ISO 26262 (basically derived from Part 4, Part 6 and 8), where applicable. The methods and measures listed in ISO 26262 have been assessed with respect to the underlying rationale to achieve the standard’s goal.

Véhicules routiers – Sécurité fonctionnelle - Utilisation d'éléments d'architecture logicielle préexistants

General Information

• Status: Not Published
• ICS: 43.040.15 - Car informatics. On board computer systems
• Technical Committee: ISO/TC 22/SC 32 - Electrical and electronic components and general system aspects
• Drafting Committee: ISO/TC 22/SC 32 - Electrical and electronic components and general system aspects
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Start Date: 05-Sep-2023
• Completion Date: 05-Sep-2023

Standards Content (Sample)

FINAL
PUBLICLY ISO/DPAS
DRAFT
AVAILABLE 8926
SPECIFICATION
ISO/TC 22/SC 32
Road vehicles – Functional safety - Use
Secretariat: JISC
of pre-existing software architectural
Voting begins on:
2023-09-05 elements
Voting terminates on:
2023-10-31
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/DPAS 8926:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023

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ISO/DPAS 8926:2023(E)
FINAL
PUBLICLY ISO/DPAS
DRAFT
AVAILABLE 8926
SPECIFICATION
ISO/TC 22/SC 32
Road vehicles – Functional safety - Use
Secretariat: JISC
of pre-existing software architectural
Voting begins on:
elements
Voting terminates on:
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/DPAS 8926:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023

---------------------- Page: 2 ----------------------
ISO/DPAS 8926:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Use of pre-existing software architectural elements into safety-related embedded
software conformant with the ISO 26262 series . 2
4.1 Objectives . 2
4.2 General . 3
4.3 Input to this clause . 4
4.3.1 Prerequisites . 4
4.3.2 Further supporting information . 5
4.4 Requirements and recommendations . 5
4.4.1 General .
...

ISO/DPAS 8926
ISO/TC 22/SC 32
ISO/AWI PAS 8926(en)
Secretariat: JISC
Date: 2023-08-21
Road vehicles – functionalFunctional safety - Use of
preexistingpre-existing software architectural elements
FDIS stage
© ISO 2023 – All rights reserved

---------------------- Page: 1 ----------------------
ISO/AWI PASDPAS 8926:2023(:(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this
publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical,
including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can
be requested from either ISO at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
E-mail: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/AWI PASDPAS 8926:2023(:(E)
Contents
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Use of pre-existing software architectural elements into safety-related embedded software
conformant with the ISO 26262 series . 2
4.1 Objectives . 2
4.2 General . 3
4.3 Input to this clause . 5
4.3.1 Prerequisites . 5
4.3.2 Further supporting information . 5
4.4 Requirements and recommendations . 6
4.4.1 General . 6
4.4.2 Classification of a PSAE . 6
4.4.3 Impact analysis . 8
4.4.4 Suitability evaluation for Class II PSAE . 9
4.4.5 Verification of the Class II PSAE use . 12
4.4.6 Changes to the PSAE design . 12
4.5 Work products . 13
4.5.1 Applicable for all PSAE Classes (see 4.4.2.7) . 13
4.5.2 Applicable for PSAE Class II (see 4.4.2.7) . 13
Annex A (informative) PSAE examp
...