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The project statement of work (SOW) is a narrative description of products, services, or results to be delivered by a project. For internal projects, the project initiator or sponsor provides the statement of work based on business needs, product, or service requirements. For external projects, the statement of work can be received from the customer as part of a bid document, (e.g., a request for proposal, request for information, or request for bid) or as part of a contract. The SOW references the following:


Cover of A Guide to the Project Management Body of Knowledge (PMBOK® Guide), Fifth Edition


Request for proposal is from customers to external company.