Think of your supply chain like a building: you can see the ground floor, but not the basement or the foundation. That hidden foundation is where most disruptions begin.
Each direct supplier is scored individually. A factory shutdown three steps away hits four suppliers at once — but you see four "random" shortages with no connection.
Map the full network like a family tree. Spot the shared weak points — one supplier that feeds many of yours — before it snaps and takes everything with it.