Final answer:
The project management plan is updated and approved through the Perform Integrated Change Control process after its initial development and approval to handle any changes in a controlled way.
Step-by-step explanation:
Once the project management plan has been developed and approved, it Is updated and approved through the Perform Integrated Change Control process. In project management, plans are not static documents; they evolve as the project progresses and as changes are needed.
The Perform Integrated Change Control process is a critical part of project management that ensures any changes to the project plan are managed in a controlled manner. This process includes reviewing all change requests, approving changes, and managing changes to the deliverables, organizational process assets, project documents, and the project management plan itself.