Which document is essential for formally approving requirements in project management?

The document that is essential for formally approving requirements in project management is the Requirements Approval Method. This document outlines the process and criteria by which requirements will be reviewed and approved by stakeholders. It ensures that there is a structured approach to assessing whether the requirements meet the necessary standards and have received the necessary endorsements from stakeholders involved in the project.

This method typically details who the approvers are, what specific criteria need to be met for approval, and the process to follow in obtaining that approval. By having a defined Requirements Approval Method, teams can avoid ambiguity during the approval process and ensure all stakeholders understand their roles and responsibilities in this crucial phase of project management.

The other documents listed serve different purposes. The Business Case provides justification for the project and outlines the benefits, costs, and risks but does not focus specifically on the approval of requirements. The Requirements Specification details the functional and non-functional requirements but does not address the method of their approval. The Stakeholder Communication Plan is aimed at facilitating communication among stakeholders throughout the project but does not specifically pertain to the formal approval of requirements. Thus, the Requirements Approval Method is the key document for ensuring requirements are formally recognized and accepted.