Two-week embed in a regional freight dispatch center. The lane-assignment heuristics had been bolted together for fifteen years. Rebuilt the assignment as a transparent rule layer the dispatchers could audit, override, and feed back into. The through-line is practical: make the mechanism legible to the people who operate it, then measure what changes when they can finally see what they are doing. That is how the work earns trust—not with a louder claim, but with a clearer surface and receipts that match the field.