ISO 26262 ASIL Decomposition Audit Checklist

A comprehensive checklist for auditing compliance with ISO 26262 Part 9 requirements in the decomposition of Automotive Safety Integrity Levels (ASILs) for complex automotive systems

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About This Checklist

The ISO 26262 ASIL Decomposition Audit Checklist is a critical tool for ensuring the proper allocation of safety requirements in complex automotive systems. This comprehensive checklist addresses the specific guidelines outlined in Part 9 of the ISO 26262 standard, focusing on Automotive Safety Integrity Level (ASIL) decomposition. By systematically evaluating the decomposition strategies, independence of safety mechanisms, and allocation of safety requirements, this checklist assists automotive safety engineers, system architects, and functional safety managers in optimizing system designs, ensuring robust safety architectures, and maintaining compliance with stringent safety standards. Implementing this checklist not only enhances the overall safety of automotive systems but also contributes to more efficient development processes by allowing for appropriate distribution of safety requirements across system components.

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Industry

Automotive

Standard

ISO 26262 - Functional Safety for Road Vehicles

Workspaces

Automotive system design offices
Laboratories
Testing Facilities

Occupations

Automotive Safety Engineer
System Architect
Functional Safety Manager
Safety Requirement Analyst
ASIL Decomposition Specialist
1
Are safety requirements appropriately allocated to system components?
2
What is the assigned Safety Integrity Level (SIL) for the system?
Min1
Target3
Max5
3
Provide a detailed description of the safety architecture implemented.
4
Are safety mechanisms designed to be independent?
5
When was the last verification of safety requirements conducted?
6
What is the current status of the functional safety assessment?
7
How many safety hazards have been identified during the assessment?
Min0
Target5
Max100
8
What mitigation measures have been implemented to address identified hazards?
9
Have the safety requirements been verified?
10
When is the next review of the functional safety assessment scheduled?
11
Are all required safety mechanisms implemented as per the design specifications?
12
How many testing scenarios have been executed to validate safety mechanisms?
Min0
Target10
Max50
13
Describe the testing methodology used for evaluating safety mechanisms.
14
How effective are the implemented safety mechanisms in achieving safety goals?
15
When were the safety mechanisms last updated?
16
Is there a clear traceability matrix for all safety requirements?
17
Where is the traceability matrix documented?
18
How many safety requirements are currently untraced?
Min0
Target2
Max100
19
What challenges have been encountered in maintaining traceability?
20
When was the traceability matrix last reviewed?
21
Is the safety verification process fully defined and documented?
22
How many verification activities have been conducted to date?
Min0
Target15
Max50
23
Provide a summary of the results from the latest verification activities.
24
What tools were used to conduct the verification activities?
25
When is the next verification activity scheduled?

FAQs

This checklist specifically addresses Part 9 of ISO 26262, which focuses on Automotive Safety Integrity Level (ASIL)-oriented and safety-oriented analyses, including ASIL decomposition.

The primary users are automotive safety engineers, system architects, functional safety managers, and safety requirement analysts involved in designing and implementing safety-critical automotive systems.

ASIL decomposition is crucial because it allows for the distribution of safety requirements across different system components, potentially reducing development costs while maintaining the overall safety integrity of the system.

The checklist covers decomposition strategies, independence of safety mechanisms, allocation of safety requirements, verification of decomposition, and documentation of the decomposition process and rationale.

ASIL decomposition should be considered early in the system design phase, typically after the initial hazard analysis and risk assessment, and refined throughout the development process as the system architecture evolves.

Benefits of ISO 26262 ASIL Decomposition Audit Checklist

Ensures compliance with ISO 26262 Part 9 ASIL decomposition requirements

Optimizes safety architectures in complex automotive systems

Facilitates efficient allocation of safety requirements across system components

Enhances the overall safety and reliability of automotive electronic systems

Supports cost-effective implementation of safety measures through appropriate decomposition