Transform Needs into Requirements and Exclusions
Examine each identified need and determine whether it should be included in your project. To make this decision, ask these questions:
As you think about the needs, remember what the sponsors told you. In the end, the sponsor must agree with your plans, so involving the sponsor early in the requirements-gathering process will save you time and headaches later.
Each need that is not a requirement is an exclusion. Document the exclusions so that the sponsor and other stakeholders know what you and your team will not provide in the project.