Glossary · Functional Safety

FMEDA

Also known as: Failure Mode, Effects, and Diagnostic Analysis

Definition

FMEDA: Failure Mode, Effects, and Diagnostic Analysis — quantitative ISO 26262 hardware metric analysis. FMEDA combines FMEA with diagnostic-coverage estimates and per-failure-mode rates to compute Single-Point Fault Metric (SPFM), Latent Fault Metric (LFM), and PMHF — the quantitative pieces ISO 26262 Part 5 requires for ASIL B and above.

Where this matters: Functional Safety Engineering (ISO 26262)

Done well, it is the audit-readable proof that hardware safety mechanisms are sufficient.

Related terms

FMEA
Failure Mode and Effects Analysis — qualitative analysis of how components fail and what they cause.
FTA
Fault Tree Analysis — top-down deductive analysis of how failures combine to a hazardous event.
ASIL
Automotive Safety Integrity Level — A through D, where D is the highest rigour.

FMEA, FTA, DFA and FMEDA — functional safety services

Need help applying FMEDA on a programme? Use the contact form to reach Agnile’s engineering team.

FMEDA

Definition

FMEA

FTA

ASIL