The SOW describes the services, end products, deliverables and performance objectives that the vendor must provide in order to meet its contractual obligations. The SOW is very important, and should state in detail such things as: what the specifications and requirements are, how the end product will perform, interim and final deliverables such as reports, models or specific tasks, the number of hours required to produce deliverables, specific deadlines, objective measures of the vendor's performance, etc. It is primarily the department's responsibility to prepare the SOW; however, the Purchasing Department can assist you.