Abstract: In an open-pit mine with several excavation sites and a fleet of trucks carrying ore from loading stations near these sites to a number of unloading stations, data concerning production schedules are manually fed into a programmer together with information on the yield of each loading station as determined by local ore analyzers, on the identity and location of vehicles as ascertained by roadside monitoring units, and on the loading and unloading rates as detected by sensing elements at the various stations. The programmer classifies the several loading stations in two groups, i.e.