A method, system, apparatus, and computer program product for processing e-commerce information are presented. A business entity may transfer e-commerce agreements through an electronic marketplace. The business entity retrieves dependency information about a commercial transaction from an e-commerce agreement. The business entity incorporates the dependency information, e.g., dates, costs, deliveries, etc., as dependency relationships within a project model that represents a project for a product or service for sale by the first business entity. User input is received for manipulating a cost dependency relationship within the project model while constraining the user input to ensure that another type of dependency relationship is not incompatible with modifications to the cost dependency relationship.