Abstract: Improved systems and methods for facilitating negotiations and managing orders for materials between buyers and sellers are provided. For example, a manufacturer can order materials from numerous suppliers using techniques of the present invention. Suppliers can access requisitions from a manufacturer. The requisitions may contain a quantity of materials and delivery dates. Systems of the present invention can identify the critical suppliers that cannot meet the requested requirements. The system can then renegotiate orders with all of the other suppliers so that the materials needed for the product arrive according to a revised schedule. The system can also respond to changes in the demand for a product by renegotiating orders with the suppliers. Systems and methods of the present invention reduce the carrying costs associated with inventories of materials.