Explanation
“If you’re working with vendors to perform some or all of the work of the project, it’s critical that they know exactly what you are asking them to do. The statement of work (SOW) details the goods or services you want to procure. In many respects it’s similar to the project scope statement, except that it focuses on the work being procured. It contains the project description, major deliverables, success criteria, assumptions, and constraints”
Excerpt From: Kim Heldman. “CompTIA Project+ Study Guide.” iBooks.