Start with What Is SIL?, then the Three Gates, then the Markov methods paper. Then open the Knowledge Hub, try the PFD calculator, or walk a worked example in SIL verification.
SIL fundamentals
What Is SIL?
A beginner-friendly story of Safety Integrity Level — what it means, what it does not mean, and how SIL 1–4 connect to risk reduction in IEC 61508 and IEC 61511.
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SIL verification
The Three Gates to SIL
Why a good PFDavg number is not enough. Probabilistic performance, architecture and systematic capability — and why the weakest gate governs the claim.
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Quantitative methods · New
The 5% That Decides Your 2oo3
Markov modelling for functional safety: a five-state model of 2oo3 voting, solved two ways, and why a 5% common-cause assumption makes PFDavg 48.5× worse.
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