During the early phase of a project, the requirements documentation was not approved.

 The Stakeholder Register is a critical document in project management that lists all stakeholders involved in a project, including their roles, requirements, expectations, and influence on the project. The fact that the leader of a user party was not included in the requirements collection communications suggests that the Stakeholder Register was either missed or outdated. This document should have been used to identify all parties with a vested interest in the project, ensuring their needs and expectations are considered during the requirements collection phase. An up-to-date Stakeholder Register is essential for effective communication and project success12.