When a business analyst uses subject matter experts to define roles and identify influencers, which project artifact is created or updated?

A company has launched a new online sales application and engaged a focus group to test how quickly the customer could place an order. The focus group also provided feedback on their satisfaction.
Which metrics tool should the business analyst use to record the results?

The document that defines the process for managing requirements revisions is the:

A major stakeholder of a project is surprised to learn that a particular requirement was not implemented during the latest launch. The business analyst tells the stakeholder that the requirement status was changed to "deferred".
What could have prevented the stakeholder from being surprised about the status change?

A project team delivers a solution based on the approved requirements and is confident that it meets the defined acceptance criteria. What should the business analyst do to obtain signoff?