The closing phase is when the project manager and the team finalize the project, deliver the outcomes to the customer, obtain formal acceptance, conduct lessons learned, and hand over the project to the operations team. Identifying the baseline go-live date, the operational training, and the handoff procedures are part of the closing activities that ensure a smooth transition and closure of the project. Reference = CompTIA Project+ Study Guide: Exam PK0-005, 3rd Edition, Chapter 14: Closing Projects, p. 333-334.