A method and system for routing a delivery vehicle to a chemical usage facility is disclosed. The chemical usage facility includes one or more chemical dispense systems that dispense one or more chemical product. The quantity of each chemical product remaining is measured and communicated to a central...http://www.google.com/patents/US7516082?utm_source=gb-gplus-sharePatent US7516082 - Scheduling delivery of chemical products based on a predicted estimated time of exhaustion
