The grey areas in IEC 61508 and IEC 61511 often turn into pressure when decisions affect schedule and cost.
Most functional safety engineers eventually face situations where the standards don’t give a clear answer.
Rejecting a design.
Challenging a SIL claim.
Explaining why something might work — but isn’t safe enough.
And often you’re making those calls alone.
The Playbook is a professional community for engineers who want experienced voices when those decisions land.
🔍 Decision Reviews – bring real grey-area situations from projects and compare judgement with peers.
💬 Scenario discussions – how others would approach the problem and defend it to management.
📄 FSMS templates & project tools – practical documents aligned with IEC 61508 lifecycle requirements.
About me: 20 years in nuclear. Exida CFSE.
Still learning — but with enough scars to make the conversations interesting.