Definition:
Failure Modes and Effects Analysis (FMEA) is a classical qualitative method for identifying potential failure modes, their causes and effects on system operation.
Note that FMEA is not explicitly called out in any functional safety code. It is the related FMEDA that is mentioned in IEC 61508.
Key Points:
- General process to identify single points of failure.
- Generally not part of the functional safety lifecycle. This could happen very early in a facility design process, or as a precursor to the FMEDA by an equipment manufacturer.
Example:
The project team performs a qualitative FMEA on a critical subsystem or interface (e.g., a new pneumatic actuator system). This would be part of the design evaluation and would occur prior to the H&RA.
See Also: FMEDA, H&RA, stated risk
Cited Source:
- IEC 60812:2018
- ASQ article
- ENCO comparison between FMEA and FMEDA