GB/T 43253.4-2023 English PDF (GBT43253.4-2023)

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GB/T 43253.4-2023: Road vehicles -- Functional safety audit and assessment method -- Part 4: Hardware level
GB/T 43253.4-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040
CCS T 35
Road vehicles - Functional safety audit and assessment
method - Part 4: Hardware level
ISSUED ON: NOVEMBER 27, 2023
IMPLEMENTED ON: NOVEMBER 27, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 4
Introduction ... 5
1 Scope ... 7
2 Normative references ... 7
3 Terms and definitions ... 7
4 General requirements ... 7
5 Hardware safety requirements ... 8
5.1 Objective ... 8
5.2 Inputs to audit and assessment ... 9
5.3 Requirements for audit and assessment ... 9
6 Hardware design ... 11
6.1 Objective ... 11
6.2 Inputs to audit and assessment ... 11
6.3 Requirements for audit and assessment ... 12
7 Assessment of hardware architecture metrics ... 15
7.1 Objective ... 15
7.2 Inputs to audit and assessment ... 15
7.3 Requirements for audit and assessment ... 16
8 Assessment of random hardware failures leading to safety goal violation ... 17
8.1 Objective ... 17
8.2 Inputs to audit and assessment ... 17
8.3 Requirements for audit and assessment ... 17
9 Hardware integration and verification ... 19
9.1 Objective ... 19
9.2 Inputs to audit and assessment ... 19
9.3 Requirements for audit and assessment ... 19
10 Hardware elements assessment ... 21
10.1 Objective ... 21
10.2 Inputs to audit and assessment ... 21
10.3 Requirements for audit and assessment ... 22
Appendix A (Informative) Hardware safety requirements ... 25
Appendix B (Informative) Hardware design ... 31
Appendix C (Informative) Assessment of hardware architecture metrics ... 40
Appendix D (Informative) Assessment of random hardware failure leading to safety
goal violation ... 43
Appendix E (Informative) Hardware integration and verification ... 47
Appendix F (Informative) Hardware element assessment ... 51
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020
Directives for standardization - Part 1: Rules for the structure and drafting of
standardizing documents.
This document is Part 4 of GB/T 43253 Road vehicles - Functional safety audit and
assessment method. The following parts have been issued for GB/T 43253:
-- Part 1: General requirements;
-- Part 2: Concept phase and system level;
-- Part 3: Software level;
-- Part 4: Hardware level.
Please note that some of the contents of this document may involve patents. The issuing
organization of this document is not responsible for identifying patents.
This document was proposed by the Ministry of Industry and Information Technology
of the People's Republic of China.
This document shall be under the jurisdiction of National Technical Committee of Auto
Standardization (SAC/TC 114).
Drafting organizations of this document: China Automotive Technology and Research
Center Co., Ltd., Imotion Automotive Technology (Suzhou) Co. Ltd., Beijing Horizon
Robotics Technology R and D Co., Ltd., Nanjing SemiDrive Technology Ltd., Infineon
Technologies Center of Competence (Shanghai) Co., Ltd., China FAW Group
Corporation, China Changan Automobile Group Co., Ltd., Neusoft Ruichi Automotive
Technology (Shanghai) Co., Ltd., Shanghai Motor Vehicle Inspection Certification and
Tech Innovation Center Co., Ltd., Shanghai Hesai Technology Co., Ltd., Shenzhen DJI
Zhuojian Technology Co., Ltd., Schaeffler (China) Co., Ltd., Beijing Changan
Automobile Engineering Technology Research Co., Ltd., Beijing National New Energy
Vehicle Technology Innovation Center Co., Ltd.
Main drafters of this document: Song Weijin, Cai Xiang, Wei Bin, Tang Shanan, Fu Yue,
Shang Shiliang, Li Bo, Shao Haihe, Wen Jiwei, Wang Xiaoyi, Wang Yu, Sun Yuyang,
Zhao Xin, Liu Hui, Zhang Xiaoliang, Zha Xiaodong, Li Zhaolin.
Road vehicles - Functional safety audit and assessment
method - Part 4: Hardware level
1 Scope
This document specifies the requirements and methods for carrying out functional
safety audit and assessment of functional safety-related activities and work results at
the hardware level of safety-related electrical/electronic (E/E) systems, to check and
judge the compliance of the development process and work results with functional
safety.
This document applies to safety-related systems containing one or more
electrical/electronic (E/E) systems installed on production road vehicles other than
mopeds.
This document does not apply to specific electrical/electronic (E/E) systems in special
purpose vehicles, for example, vehicle systems designed for disabled drivers.
2 Normative references
The following documents are referred to in the text in such a way that some or all of
their content constitutes requirements of this document. For dated references, only the
version corresponding to that date is applicable to this document; for undated references,
the latest version (including all amendments) is applicable to this document.
GB/T 34590.1~34590.12-2022, Road vehicles - Functional safety
GB/T 43253.1-2023, Road vehicles - Functional safety audit and assessment
method - Part 1: General requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 34590.1-
2022 apply.
4 General requirements
The audit and assessment requirements defined in GB/T 43253.1-2023 apply to this
document.
8 Assessment of random hardware failures leading to safety
goal violation
8.1 Objective
The objective of this chapter is to assess whether the residual risk is low enough by
assessing random hardware failures that lead to safety goal violation.
8.2 Inputs to audit and assessment
In order to carry out the review and assessment process specified in this chapter, the
following inputs shall be available:
-- analysis of safety goal violations caused by random hardware failures;
-- definition of hardware-specific measures, including, if necessary, the basis for
the effectiveness of special measures;
-- a review report assessing the safety goal violation caused by random hardware
failures.
Note 1: Applicable to safety goals of levels ASIL(B), C and D.
Note 2: To support the audit and assessment, other supporting materials that may be
required are as follows:
-- hardware safety requirements specification;
-- hardware design specifications;
-- hardware safety analysis report;
-- hardware related failure analysis report;
-- technical safety concepts (if applicable);
-- system architecture design specifications (if applicable).
8.3 Requirements for audit and assessment
The audit and assessment for the assessment of random hardware failures that result in
safety goal violation shall cover the check items in Table 9.