Which document best provides the boundaries for product development?

Once the requirements are compared to internal and external quality standards, what should the business analyst do next?

A new business analyst has taken over on a project that is in the development phase. The project manager is looking for an update on requirements status.
What should the business analyst use to help communicate the status?

Which of the following tools will help facilitate the decision-making process when stakeholders do not agree on the value of an initiative?

Company A is working on implementing a new platform with multiple stakeholders. The business analyst has gathered the requirements and established a baseline. However, scope creep is a persistent problem.
What could the business analyst have established to help manage this situation?