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

The business analyst is seriously concerned about the possibility of differing interpretations of data items mentioned in the requirements documents. Which course of action should the business analyst take to minimize the risk of misunderstanding?

An insurance company embarks on a project to replace its current enrollment and billing software application, which will no longer be supported by the end of the calendar year. The new enrollment and billing application must be implemented before the current vendor contract ends. The business analyst gathers the initial requirements for the new enrollment and billing application. Based on the large volume of requirements, the business analyst realizes that the requirements will need to be prioritized.
Which requirements prioritization method should the business analyst use for this project?

A business analyst needs to estimate the effort associated with project requirements. However, the lack of detail is concerning. What technique could the business analyst use to help alleviate this concern?

After a project was delivered, the business analyst learns of a project objective with no associated requirement.
What would have helped determine this issue before delivery?