Failure Modes Effects and Diagnostic Analysis

The FMEDA (Failure Modes Effects and Diagnostic Analysis) is a methodology for the detailled determination of failure causes and their Impact on the system and can be applied in early phases of the system development very efficiently in order to detect weak points early.

Requirements in safety standards are to avoid failures in a safety relevant system and to reduce them to an acceptable residual error probability or residual error rate. In connection with the selected system structure and the Safety Integrity Level which has to be achieved, the relationship of the Safe Failure Fraction (SFF / SPFM) has to be calculated. For this reason the FMEDA together with mathematical models and calculation methods comes into place to estimate the failures with the resulting residual error probability or residual error rate.

Our Services

In hardware development our goal is to avoid mistakes and/or manage them and to Limit the probability of dangerous failures to a defined value. Our offer consists in determining the required parameters in light of the IEC 61508, IEC 61800-5-2, IEC 62061, ISO 13849-1, ISO 26262, such as λdu, λsd, λdd and λsu, PFH, SFF, DC, MTTFD, CCF, ß- Faktor, SPFM, LFM, DCRF, λSPF, λRF, λMPF and λs.

The determination of the required Parameters will be conducted with the help of our FMEDA-Workbench tool. The failure rates of the used elektronical components are extracted from the standard RDF 2000 UTE C 80-810 (IEC 62380) which is used in Europe and developed by CNET to predict reliabilities.

 If you want to reliability Standards like SN 29500, IEC 61709, and FIDES Guide can be included and used.