Brief but powerful, the scope of work is one of the essential tools in the project management world. This is because it describes exactly what falls under the framework of a project, as well as what doesn't.
Software design documentation
Software design documents explain how a specific piece of software or software feature should be developed. They're important technical documents that focus on the how of the development process.
Statement of work
A statement of work, also known as a SoW, is an essential project planning and project management tool. At its most basic, it acts as a kind of formative contract between a customer and a company.