To improve the efficiency of product distribution for a centralized bakery, I first performed each person's tasks and discovered that constructing optimal minimum-distance routes would not significantly reduce costs but replacing the physical validation of new routes with a manual mathematical computation or simulation would. The trick was getting management to trust the simulation enough to use it.
Rajagopalan, Sampath, Medini Singh, Thomas Morton, and Ephraim Martin, IV. "Centralized bakery reduces distribution costs using simulation." Interfaces 28, no. 4 (April 1998): 38-46.
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