The ASIL table
Based on ISO 26262-3. ASIL determination is one step of a hazard analysis and risk assessment (HARA), which must be reviewed by people who know the item and its use. This tool does not replace that review.
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Questions
How is the ASIL worked out?
Each hazardous event is rated for severity (S1–S3), probability of exposure (E1–E4) and controllability (C1–C3). The ISO 26262-3 table gives ASIL D only for S3, E4 and C3; each step lower in any class lowers the ASIL by one, down to QM. Any class rated 0 gives QM.
What does QM mean?
Quality management: normal development processes are enough and no specific ISO 26262 requirements apply to that hazard.
What changes between ASIL A and ASIL D?
Higher ASILs need more rigorous methods: stricter design and coding rules, higher test coverage (MC/DC for ASIL D units), more independent reviews, and tighter hardware metrics such as SPFM 99% and LFM 90% for ASIL D.
Working towards ISO 26262?
Dervo supports hazard analysis, safety requirements and safety-focused testing for automotive suppliers.