Some embodiments provide a program. The program receives from a client device a sourcing request specifying a plurality of variables comprising set of sources, a set of items, and a set of quantities associated with the items. The program further receives a set of offers from the set of sources. Each offer in the set of offers specifies an item in set of items, a price associated with the item, and a quantity associated with the item. The program also receives a selection of a set of defined scenarios for the sourcing event and the set of offers. The program further generates a set of linear programming models based on the set of defined scenarios the sourcing and the set of offers. The program also instructs solvers to solve the liner programming models.