ISO21448-2019.pdf

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35260344_1.docx

ISO/TC 22/SC 32/WG 8 N 701 REPLACES: ISO/TC 22/SC 32/WG 8 N 700 ISO/TC 22/SC 32/WG 8 Functional safety E-mail of Secretary: fritzsche@vda.de Secretariat: DIN 700 ISO WD21448 RC2 Date of document 2019-05-20 Expected action Due Date Comment 2019-08-08 Background Working Draft for circulation and national commenting Members of SC32/WG8 are kindly requested to study and comment the attached draft. Please use only the commenting formsheet as provided in Folder "Public Information" of this committee and will in all columns in a correct way, except the last column. Only 1 Comment Sheet per P-Member country shall be send to the PL nicolas.becker@mpsa.com and to the secretatiat fritzsche@vda.de by E-Mail as WordFile (.docx) before the above mentined deadline as agreed at our last meeting. Remarks for using Commenting formsheet: - all collumns 1 to 7 need to be filled in - tabels neet be be inserted as "bitmap" in a cell not as table - Column 8 need to be totally empty - no information after the table, those additional information need to be stored in the relevant cell as a "linked file"

Version date 2019-05-17; please reply before 2019-08-17 ISO/WD 21448 :2019 ISOTC22/SC32/WG8 Secretariat: DIN Road vehicles—Safety of the Intended Functionality Working Draft This document is not an ISO International Standard. It is distributed for review and comment. It is subject to change without notice and may not be referred to as an International Standard. 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 supporting documentation. Warning for WDs and CDs

© ISO 2018 All rights reserved. Unless otherwise specified, 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 Case postale56 CH-1211 Geneva 20 Tel.+ 41 22 749 01 11 Fax+ 41 22 749 09 47 E-mailcopyright@iso.org Webwww.iso.org Published in Switzerland. © ISO2017–All rights reserved 2

Contents Foreword ..................................................................................................................................................................1 Introduction.............................................................................................................................................................2 1 2 Scope ............................................................................................................................................................3 Normative references..............................................................................................................................4 Terms and definitions .............................................................................................................................4 3 4 5 6 Function, system specification and design (intended functionality content)........................20 Overview and organization of activities in the development process.....................................11 Identification and Evaluation of hazards caused by the intended functionality ..................23 Overview of activities in the development process....................................................................................11 Distributed SOTIF development activities.......................................................................................................19 Objectives..........................................................................................................................................................................20 Functional description...............................................................................................................................................20 Consideration on system design and architecture......................................................................................21 Work Products...............................................................................................................................................................23 Objectives..........................................................................................................................................................................23 Hazard identification..................................................................................................................................................23 Hazard analysis..............................................................................................................................................................25 Risk evaluation of the intended function.........................................................................................................25 Analysis of reasonably foreseeable misuse.....................................................................................................25 Specification of a validation target......................................................................................................................26 Work Products...............................................................................................................................................................27 Objectives..........................................................................................................................................................................27 Inputs to this clause.....................................................................................................................................................27 Analysis of triggering conditions..........................................................................................................................28 Acceptability of the response of the system to the triggering conditions.......................................32 Work Products...............................................................................................................................................................33 Objectives..........................................................................................................................................................................33 General...............................................................................................................................................................................33 4.1 4.2 5.1 5.2 5.3 5.4 6.1 6.2 6.3 6.4 6.5 6.6 6.7 7.1 7.2 7.3 7.4 7.5 8.1 8.2 © ISO2017–All rights reserved 7 Identification and evaluation of performance limitations and potential triggering conditions...............................................................................................................................................................27 8 Functional modifications to reduce SOTIF related risks .............................................................33 3

9 Definition of the verification and validation strategy ..................................................................37 10 Evaluate known hazardous scenarios (Area 2)..............................................................................39 11 Evaluate unknown hazardous scenarios (Area 3).........................................................................42 Measures to improve the SOTIF............................................................................................................................34 8.3 Updating the system specification.......................................................................................................................36 8.4 Work Products...............................................................................................................................................................36 8.5 Objectives..........................................................................................................................................................................37 9.1 Planning and specification of integration and testing...............................................................................38 9.2 Work products...............................................................................................................................................................39 9.3 Objectives..........................................................................................................................................................................39 10.1 Sensor verification.......................................................................................................................................................40 10.2 Decision algorithm verification.............................................................................................................................40 10.3 Actuation verification.................................................................................................................................................41 10.4 Integrated system verification...............................................................................................................................41 10.5 Work products...............................................................................................................................................................42 10.6 Objectives..........................................................................................................................................................................42 11.1 Evaluation of residual risk.......................................................................................................................................43 11.2 Validation test parameters......................................................................................................................................43 11.3 Work products...............................................................................................................................................................44 11.4 Objectives..........................................................................................................................................................................44 12.1 Methodology for evaluating SOTIF for release..............................................................................................44 12.2 Criteria for SOTIF evaluation..................................................................................................................................45 12.3 Examples of structuring the SOTIF argumentation with GSN...............................................................47 A.1 Example of interaction between ISO 26262 and ISO 21448..................................................................57 A.2 Examples of the application of SOTIF activities............................................................................................66 A.3 Method for deriving SOTIF misuse scenarios................................................................................................73 B.1 Example construction of scenario for SOTIF safety analysis method...............................................76 B.2 Introduction to the SORA method........................................................................................................................79 B.3 Examples of adaptation of safety analyses to identify and evaluate the potential triggering B.4 conditions and performance limitations................................................................................................................................83 © ISO2017–All rights reserved Annex A (informative) General guidance on SOTIF....................................................................................47 Annex C (informative) Guidance on SOTIF verification and validation ...............................................94 Annex B (informative) Guidance on Scenario and system analyses .....................................................73 12 Methodology and criteria for SOTIF release ...................................................................................44 4

C.1 systems 94 C.2 C.3 C.4 D.1 D.2 D.3 Example for definition and validation of an acceptable false positive activation rate in AEB Validation of SOTIF Applicable Systems.........................................................................................................101 Perception system verification and validation............................................................................................103 Guidance on Simulation and Scenario Based Testing..............................................................................113 Guidance for driving policy specification.......................................................................................................119 Implications for Machine Learning....................................................................................................................127 SOTIF considerations for HD-maps...................................................................................................................131 Annex D (informative) Guidance on specific aspects of SOTIF............................................................ 119 © ISO2017–All rights reserved 5

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 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, Part1. 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, Part2. www.iso.org/directives Attention is drawn to thepossibility 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 any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received. www.iso.org/patents Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISO's adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information The committee responsiblefor this document is ISO/TC22/SC32/WG8 ISO21448consists of this documentonly. © ISO2017–All rights reserved 1

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