The knowledge that walks out

The most expensive risk in any transition isn't usually the one on the register. It's the one walking out the door.

I've seen it play out more than once: a business goes through a period of change - a contract handover, a restructuring, a change of provider - and loses one or two people along the way who happen to hold knowledge nobody else wrote down. Not because anyone was careless. Because that knowledge was never treated as an asset in the first place. It just lived in someone's head, and it left with them.

The gap doesn't show up immediately. It shows up weeks later, when a decision needs context nobody has, or a query comes in and the only honest answer is "I'm not sure - the person who'd know isn't here anymore."

A contract register tells you what you've committed to. A risk register tells you what could go wrong. Neither one tells you who actually holds the operational knowledge that keeps things running - and that's usually the gap that gets found out during, not before, a period of change.

If you're heading into any kind of transition, it's worth asking a blunter question than "what could go wrong": if two key people left tomorrow, what would we lose that isn't written down anywhere?