Systems & Design

Understanding How To Assess Tool Confidence Levels For ISO 26262

A look at the software tools clause in the automotive standard, plus insights about how to meet new requirements.


ISO 26262, the automotive functional safety standard, requires the assessment of software Tool Confidence Levels (TCLs). Some SoC designers are under the impression that all tools must be classified with a TCL1. In reality, the goal is to classify your tools accurately for your specific situation and use case. This white paper provides insight on assessing TCLs that are consistent with ISO 26262 requirements as documented in clause 11 of part 8 titled, “Confidence in the Use of Software Tools,” explains the intent of this clause, and provides guidance on how to effectively meet the standard’s requirements.

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