The barge can't sail. So the optimiser weighs every alternative side by side — rail, road, combined, or hold — and picks the best one that still hits the deadline.
When the barge can't sail, the optimiser scores every alternative and picks the best route that still hits the deadline.
Barge is out (low water). The system instantly evaluates every remaining option on cost, CO₂, lead time and — above all — whether it still hits the delivery window.
Rail is the best route that still hits the deadline: modest extra cost, low CO₂, on time. Road would be faster but pricier and far higher-CO₂; holding for the next barge is cheapest and greenest — but it would miss the window.
When one mode is gone, the optimiser weighs all the alternatives and picks the best one that still hits the deadline. KPI figures above are illustrative placeholders.
Honest by design: every alternative to the lost barge leg is a little pricier and/or higher-CO₂ — that is the cost of resilience. The win is choosing the best option that still arrives on time, instead of holding for the next barge and missing the window. KPI figures are illustrative placeholders.