The statement of work defines the requirements necessary for the products or services to be delivered by projects. When involved in procurement for project products, services or results, all of the following may be used to acquire the necessary information EXCEPT: The statement of work can be created and sent to selected sellers in the form of a request for proposal, request for information or request for quotation. A requested change is not typically associated with the statement of work as it applies to the procurement process. (PMBOK Guide - Fourth Edition, Page 75)