What input in the Close Project or Phase process is used for establishing the project closure procedure?

The project management plan is essential for establishing the project closure procedure because it serves as the overall roadmap for the project. This document encapsulates various components, including how the project is planned, executed, monitored, and closed. Specifically, it outlines the processes for closing the project, ensuring that all necessary steps are followed to formally conclude the project or a project phase. This adherence to the plan allows for a structured transition, ensuring compliance with organizational policies and stakeholder requirements.

In contrast, while the lessons learned document provides insights into what went well and what did not throughout the project, it is more focused on capturing experiences rather than dictating the closure procedure itself. The project schedule focuses on timelines and task completion but does not direct how closure should be managed. The quality management plan deals with quality assurance and control processes and does not encapsulate the broader project closure practices. Thus, the project management plan is the most comprehensive and foundational element for establishing how to effectively close a project or phase.