Using a failure modes, effects and diagnostic analysis (FMEDA) to measure diagnostic coverage in programmable electronic systems

A novel method for SIL verification based on system degradation using reliability block diagram

“…where λ SD ¼ λ S DC (Diagnostic Coverage, refer to [20]). After any one channel fails, the 1oo2D architecture degrades to 1oo1D architecture to continue working.…”

“…Dutuit [19] presented a methodology to assess the PFD G by means of Fault Trees and got similar results compared to the results obtained by means of Monte Carlo Simulations based on a Petri net model. Globe [20] introduced the FMEA technique to calculate the diagnostic coverage used in PFD G calculations. Oliveira [21] introduced a generalized equation for PFD G calculations to any KooN architecture by using simplified equation technique and the results obtained by the generalized equation are close to those in IEC 61508-6.…”

A Study on FMEDA Process for SIL Certification : A Case Study of a Flame Scanner

“…철도분야에서는 철도시스템의 신뢰성, 가용도, 유지보수성, 안전성의 명세 및 입증에 대한 국제규격인 IEC 62278을 통해 안전 확보 기준인 SIL에 대한 요구사항 수립, 설계 및 제작, 설 치, 운영, 유지보수 등의 단계별 검증을 거쳐 안전을 입증하는 것을 권고하였으며, 철도시스템 소프트웨어의 경우 IEC 62279 에 의해 표준화되었다 Jo et al, 2010 (Sammarco, 2007). (Goble and Brombacher, 1999). …”

Risk Assessment and Functional Safety Analysis to Design Safety Function of a Human-Cooperative Robot

“…First, the component failure rates, failure modes and failure mode distributions of the SRS are obtained. Second, failure modes, effects, and diagnostic analysis (FMEDA) 1 is implemented to examine the effects of the failure modes on the SRS (Goble et al, 1999). Next, the safety-failure fraction (SFF) and the probability of failures per hour (PFH) are calculated on the basis of the result of FMEDA in order to examine whether the target SIL has been achieved (IEC 61508 Technical Committee, 1998).…”