The aim of FMEDA is to determine the proportion of safe failures (SFF = safe failure fraction) and the degree of diagnostic coverage (DC = diagnostic coverage) for a system according to the requirements from IEC 61508 or ISO 26262.

The safe failure fraction and the diagnostic coverage are used as evidence of the hardware safety requirements as part of a safety analysis according to IEC 61508 or ISO 26262. The FMEDA comprehensively evaluates every component in the system. The evaluation of whether the failure of the respective component has safety relevance is also relevant here. Using the component failure data, required metrics are calculated according to the normative specifications (IEC 61508 or ISO 26262) in order to obtain information about the safety level of the system.

Glossary Technical terms at a glance