Can anyone share their experience? Very practical two questions related to an issue which exists in many PFDavg calculations. What's your approach to a safety loop that includes typical electrical final elements, e.g. contactors? Although the IEC61508 and IEC61511 standards apply to electrical devices, many such solutions widely used in industry lack certification and reliability data. And if the data is available, it's usually related to PFH and is based on B10d - not well suitable for demand mode of operation calculations. Second one: how do you confirm their systematic capability?

I'll hold my hands up: I've been quiet in here for longer than I would have liked. Project work took over, and the community hasn't had the attention it deserves. That's changing from this week. Here's what's coming: - Decision Review Live is back — Friday 17th July, 6pm. Bring a real grey-area decision from a live project and we'll work through it together. - A new cohort of the nuclear programme opens in September — more on that shortly. - Q&A is coming back, running bi-weekly. - New SILVerify features are in development and will be live soon. - More case studies and guides on the way. Got a question sitting in your drafts? Post it, and let the community do its thing.

Dear All, Long time i don't post. I am back with my planning to verify my SIL achievement of logic solver. I am using ABB AC800M HI (SIL3 capable), and has 1oo2D architecture where both CPU & Safety Module (diverse with the CPU) is executing logic simultaneously and have cross diagnostic feature. I saw exida 8 variables of PFDavg is describing in 1oo1 architecture only, and i know that exida uses Markov Process (continuous markov) for modelling. I want to verify my SIL achievement use the same method, however i have 1oo2D architecture not 1oo1 and i need to consider the beta factor as well in my equation. Any of you have the literature to derive the PFDavg from markov process? I have discussed with AI as well and it can show me how to do from addressing the states and kormogolov differential equation, but i'm not entirely sure, i know you all may have experience regarding this matter, if you can please give me the flowchart how to do or to share some whitepaper of this matter, i may need some actual literature to back me up of my calculation later.

Hi everyone, I’m working on something new for SILVerify — an AI coach to help newer FS engineers work through SIL verification calculations. Would this be useful to you or your team? Just trying to gauge if it’s something that would be useful or not. Drop a comment.