GB/T 34590.10-2022 English PDF (GBT34590.10-2022)

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GB/T 34590.10-2022: Road vehicles -- Functional safety -- Part 10: Guideline
GB/T 34590.10-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040
CCS T 35
Replacing GB/T 34590.10-2017
Road Vehicles - Functional Safety - Part 10: Guideline
(ISO 26262-10:2018, Road Vehicles – Functional Safety – Part 10: Guidelines
on ISO 26262, MOD)
ISSUED ON: DECEMBER 30, 2022
IMPLEMENTED ON: JULY 1, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 4
Introduction ... 7
1 Scope ... 11
2 Normative References ... 12
3 Terms and Definitions ... 12
4 Key Concepts of GB/T 34590 ... 12
4.1 Functional safety for automotive systems (relationship with GB/T 20438) ... 12
4.2 Item, system, element, component, hardware part and software unit ... 15
4.3 Relationship between faults, errors and failures ... 16
4.4 FTTI and emergency operation tolerant time interval ... 17
5 Selected Topics Regarding Safety Management ... 21
5.1 Work product ... 21
5.2 Confirmation measures ... 22
5.3 Understanding of safety cases ... 25
6 Concept Phase and System Development ... 27
6.1 General ... 27
6.2 Example of hazard analysis and risk assessment ... 27
6.3 An observation regarding controllability classification ... 28
6.4 External measures ... 28
6.5 Example of combining safety goals ... 30
7 Safety Process Requirement Structure - Flow and Sequence of the Safety
Requirements ... 31
8 Concerning Hardware Development ... 34
8.1 The classification of random hardware faults... 34
8.2 Example of residual failure rate and local single-point fault metric evaluation ... 40
8.3 Further explanation concerning hardware ... 54
8.4 PMHF units — Average probability per hour ... 63
9 Safety Element out of Context ... 66
9.1 Safety Element out of Context development ... 66
9.2 Use cases ... 68
10 An Example of Proven in Use Argument ... 77
10.1 General ... 77
10.2 Item definition and definition of the proven in use candidate ... 77
10.3 Change analysis ... 78
10.4 Target values for proven in use ... 78
11 Concerning ASIL Decomposition ... 79
11.1 Objective of ASIL decomposition ... 79
11.2 Description of ASIL decomposition ... 79
11.3 An example of ASIL decomposition ... 80
12 Guidance for System Development with Safety-Related Availability
Requirements ... 83
12.1 Introduction ... 83
12.2 Notes on concept phase when specifying fault tolerance ... 84
12.3 Availability considerations during hardware design phase ... 94
12.4 Software development phase ... 97
13 Remark on “Confidence in the Use of Software Tools” ... 97
14 Guidance on Safety-Related Special Characteristics ... 99
14.1 General ... 99
14.2 Identification of safety-related special characteristics ... 100
14.3 Specification of the control measures of safety-related special characteristics ... 101
14.4 Monitoring of the safety-related special characteristics ... 101
Annex A (Informative) Fault Tree Construction and Applications ... 103
Bibliography ... 106
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 10 of GB/T 34590 Road Vehicles - Functional Safety. GB/T 34590 has
issued the following parts:
--- Part 1: Vocabulary;
--- Part 2: Management of Functional Safety;
--- Part 3: Concept Phase;
--- Part 4: Product Development at the System Level;
--- Part 5: Product Development at the Hardware Level;
--- Part 6: Product Development at the Software Level;
--- Part 7: Production, Operation, Service and Decommissioning;
--- Part 8: Supporting Processes;
--- Part 9: Automotive Safety Integrity Level (ASIL)-oriented and Safety-oriented Analyses;
--- Part 10: Guideline;
--- Part 11: Guidelines on Applications to Semiconductors;
--- Part 12: Adaptation for Motorcycles.
This Document replaced GB/T 34590.10-2017 Road vehicles - Functional safety - Part 10:
Guideline. Compared with GB/T 34590.10-2017, the major technical changes of this Document
are as follows besides the structural adjustment and editorial modifications:
--- Change the scope of application of the standard from "mass-produced passenger cars"
into "mass-produced road vehicles other than mopeds"; and modify the description of
the scope (see Clause 1 of this Edition; Clause 1 of 2017 Edition);
--- Add "FTTI and emergency operation fault tolerance time interval" (see 4.4 of this
Edition);
--- Change the description of the general provisions of the accreditation measures (see 5.2.1
of this Edition; 5.2.1 of 2017 Edition);
--- Change the description of functional safety assessment (see 5.2.2 of this Edition; 5.2.2
of 2017 Edition);
--- Change the description of the understanding of the safety profile (see 5.3 of this Edition;
5.3 of 2017 Edition);
--- Change the description in Figure 8 (see Figure 8 of this Edition; Figure 7 of 2017 Edition);
--- Change the description in Figure 9 (see Figure 9 of this Edition; Figure 8 of 2017 Edition);
--- Change the description of the consideration of exposure duration in the calculation of the
probability measure of random hardware failure (PMHF) (see 8.3.2.2 of this Edition;
8.3.3 of 2017 Edition);
--- Add "typical dual-point failure mode (intended function and safety mechanism)" (see
8.3.2.3 of this Edition);
--- Add "calculation formula" (see 8.3.2.4 of this Edition);
--- Add "PMHF unit --- average probability per hour (see 8.4 of this Edition);
--- Add "Guidelines for the development of systems with safety-related availability
requirements" (see Clause 12 of this Edition);
--- Delete Annex A of 2017 edition.
This Document modifies and adopts ISO 26262-10:2018 Road Vehicles – Functional Safety –
Part 10: Guidelines on ISO 26262.
The technical differences and causes between this Document and ISO 26262-10:2018 are as
follows:
--- Change the subclause structure of 13.3 (see 13.3) [Translator Note: here it shall be 12.3];
so that the subclause structure is more rational.
This Document made the following editorial modifications:
--- Change the paragraph sequence of the Scope;
--- Delete the title of 4.3.1.
Please note some contents of this Document may involve patents. The issuing agency of this
Document shall not assume the responsibility to identify these patents.
This Document was proposed by the Ministry of Industry and Information Technology of PRC.
This Document shall be under the jurisdiction of National Technical Committee on Auto of
Standardization Administration of China (SAC/TC 114).
Drafting organizations of this Document: China Automotive Technology and Research Center
Co., Ltd.; Pan Asia Technical Automotive Center Co., Ltd.; China FAW Group Co., Ltd.; Hella
Road Vehicles - Functional Safety - Part 10: Guideline
1 Scope
This Document provides an overview of the GB/T 34590 series of standards, as well as giving
additional explanations, and is intended to enhance the understanding of the other parts of this
series of standards. This Document has an informative character only and describes the general
concepts of the GB/T 34590 series of standards in order to facilitate comprehension. The
explanation expands from general concepts to specific contents.
This Document is intended to be applied to safety-related systems that include one or more
electrical and/or electronic (E/E) system...