FMEDA

FMEDA (Failure Modes Effects and Diagnostic Analysis) is a procedure for the detailed determination of failure causes and their effect on the system and can be used very efficiently in the early phases of system development in order to recognise weak points at an early stage.

Requirements in safety standards are to avoid faults in a safety-relevant system and to reduce them to an acceptable residual fault probability or residual fault rate. Depending on the selected system structure and the safety integrity level to be achieved, the ratio of safe failure fractions (SFF or SPFM) must be calculated. For this purpose, the FMEDA is used with mathematical models and calculation methods to estimate the residual error probabilities or residual error rates resulting from failures.

The aim of hardware development is to avoid and/or control faults and to limit the probability of dangerous failures to defined values. We offer to determine the parameters required by 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-factor, SPFM, LFM, DCRF, λSPF, λRF, λMPF and λs.

The required parameters are determined with the help of an FMEDA workbench created by us. The failure rates of the electronic components used are taken from the reliability prediction standard RDF 2000 UTE C 80-810 (IEC 62380) developed in Europe by CNET.

On request, other reliability standards such as SN 29500, IEC 61709, FIDES Guide etc. can also be included or applied.