Drop warehouses, customers and risk zones on the map. Knock a warehouse offline or draw a flood / bushfire zone, then re-solve to see how supply re-routes to the nearest working site - and who is left at risk.
Networks are tested by removing nodes and links - resilience is what survives.
Knock out a hub or arc and watch flow reroute; the loss measures criticality.
Protect the elements whose failure costs most flow, not the busiest-looking ones.
