A system and method for allocating suppliers to customers locate a plurality of suppliers in a geographical information system. Relative capability associated with each of the plurality of suppliers is determined. For each supplier in the plurality of suppliers, the system and method generate lines by linking said each supplier to neighboring suppliers in the plurality of suppliers, establish relative capability points on the lines between said each supplier and the neighboring suppliers, and define boundaries of a coverage region associated with said each supplier based on the relative capability points. A customer located in the coverage region is allocated to the associated supplier of the coverage region.