Failure Modes Effects and Diagnostic Analysis

A Failure Modes and Effects Analysis (FMEA) is a systematic way to identify and evaluate the effects of different component failure modes, to determine what could eliminate or reduce the chance of failure, and to document the system in consideration.

An FMEDA (Failure Modes, Effects and Diagnostic Analysis) is an FMEA extension. It combines standard FMEA techniques with extension to identify online diagnostics techniques and the failure modes relevant to safety instrumented system design.

exida Tool
  • exida SILcal v.9

SILcal is an analysis tool which shall help and support hardware designers of safety-related systems to:

  • carry out a detailed Failure Modes, Effects and Diagnostics Analysis (FMEDA) according to IEC 61508/ ISO 26262 with:
    • traceable failure rates
    • traceable distribution of the failure rates for the different failure modes
  • calculate the safety metrics like Safe Failure Fraction (SFF) or PFDavg according to the requirements of IEC 61508 or SPFM, LFM and hardware failure rate according to the requirements of ISO 26262
  • generate a complete FMEDA report for each analyzed element or subsystem
  • concentrate on the analysis work by offloading the development team from searching and selecting activities for failure rates and failure modes.


Stephan Aschenbrenner

Birkensteinstr. 53
83730 Fischbachau
Phone: +49-8362-507274
Fax: +49-8362-507275