Methods, systems, and software for determining sources of supply are provided. The system for determining sources of supply is centralized so as to be accessible to a plurality of clients. Sources of supply may be determined and the results prioritized according to user defined criteria. Specifically, the system may offer or facilitate a reusable, centralized service that can data mine sources of supply, which are stored in a business object. These sources of supply may include transportation lane, purchase contract, scheduling agreement, material costing, and any other suitable sources of supply. In some cases, this example system can assign priorities to centralized sources of supply that may help make decisions easier for the planner.