Development of General Failure Data for SIS Components
This insightful webinar on the calculation of the average Probability of Failure on Demand (PFD) for Safety Instrumented Functions (SIFs), a crucial step in the IEC 61511 safety lifecycle. This session will delve into how PFD depends on various factors, including component failure rates sourced from:
- Vendor data from Failure Modes Effects and Diagnostics Analysis
- Vendor data from field returns
- Field data from operating plants
- Industry data from groups of companies
- Generic data compiled from industry sources
Edward Marszal, President of Kenexis, highlights how Kenexis and other organizations analyze both publicly available and proprietary data to provide “generic” failure rates. Learn about the expert judgment involved in drawing from key sources like the ISA Technical Report, CCPS, OREDA, and NPRD.
The webinar also covers how Kenexis combines data from diverse sources and applies expert analysis to adjust failure rates based on industry relevance and specific failure modes. Discover how these rates are conservatively selected to meet IEC 61511 standards, ensuring a 70% confidence level that actual failure rates are likely lower than estimated.
This webinar is part of Kenexis’ ongoing commitment to providing the industry with the tools and knowledge needed to ensure the highest standards of safety and compliance.
Following the webinar, Dr. David Smith reached out to us regarding his book and the FARADIP database that were highlighted during the session. He requested that we share the updated information about his database, which has been continuously updated for over 30 years and is now at version 52.