Drawing the Lines: IEC 62443-3-2 Risk Assessment, Part One — the System Under Consideration, Initial Risk, and Zones and Conduits

Deep End Era. Engineering with Sankalp · Oct 28, 2026 · 1h 3m

The Al Sahil Gas Complex is adding a fifth gas train, and this time the EPC's cyber risk engineer Leila Nasser wants the security design to start at FEED, not after the vendor is chosen. With the plant's process safety lead Rafa Ortega, she spends a week turning a flat list of four hundred assets into a zone and conduit model. Part seven of The Deep End's 62443 series covers the first half of IEC 62443-3-2: what it requires, why its order matters, and how to draw the lines.

Chapters

00:00:00 Cold open: four hundred rows

00:04:16 The seven steps

00:06:53 ZCR one: what are we actually…