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Functional Safety Play Book

230 members • Free

4 contributions to Functional Safety Play Book
📢 FSMS Templates — Now Live!
Following a number of requests from premium members, I'm pleased to let you know that the first documents from the Functional Safety Management System are now live in the Functional Safety Management System — IEC 61511 / IEC 61508 classroom. The following documents are now available: ✅ Functional Safety Management Plan (FSM-PLAN-001) ✅ Personnel Competency Management Procedure (FSM-PRC-COMP) ✅ Detailed Safety Requirements Specification (FSM-PRC-DSRS) More documents are being added regularly until the full management system is complete, including LOPA, SIL Verification, FSA, and more. A note on pricing 👇 The membership is currently available at a founders price — this will increase as the FSMS is completed. If you've been sitting on the fence, now is the time to join before the price goes up. Thanks for your patience while I've been putting this together — I'm committed to building something genuinely useful for you all.
📢 FSMS Templates — Now Live!
1 like • 14d
Seems really detailed and meticulous - Looking forward to digging in deeper!
Cyber
Hi everyone, I’ve started looking into Cyber certifications and I’m wonder if anyone can recommend some. It’s not something I’m massively into but I don’t think I can avoid it any longer 😂
1 like • 14d
I completed my FS engineering certification with Tüv rheinland, and I really liked that course, so am I am looking into the CS certifications as well: https://www.tuv.com/landingpage/en/training-functional-safety-cyber-security/detail-pages/zertifikate/cs-specialist.html
Hi All - Systems that pre date 61508
Hi all thanks for the add, this looks like a really good way to share experience in the functional safety world. Thanks for setting up Richard. I have a question for you all on the requirements when adding a new SIF to an existing SIL2 system that was designed over 40 years ago and was never designed to 61508. What things would we consider to make this possible without a full system redesign.
0 likes • 15d
Does the need for a new SIF come from a modification to the system, or how is it motivated? In the machinery sector, modifications requiring additional safety functions, would typically be considered "a significant modification", potentially requiring a new CE-marking, including an assessment of the safety system as a whole.
Source for failure modes
What is the best way to know the failure modes of components? Manufacturers usually don't provide failure modes and failure modes in databases as NPRD are usually very ambiguous.
3 likes • 15d
For complex components, i.e. MCUs, ASICS, etc. I usually go with the 50/50% rule for dangerous vs. safe failures, and so I dont need the specific failure modes. For simpler components, my main resources are: - IEC62061:2009 (Machinery specific) - FMD91 (Failure Mode/Mechanism Distributions, 1991, Reliability Analysis Center (RAC)) - There are more recent version from 2013 and 2016, but I think the old one is easier to use
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Morten Juelsgaard
2
15points to level up
@morten-juelsgaard-1685
Functional safety enginner, consultant, electronics development, compliance assessment.

Active 10h ago
Joined Mar 8, 2026
Denmark
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