A project manager is required to maintain various documents and procedures. Which of the following require ongoing attention and periodic updates?

The project charter is created at project initiation to authorize the project and is rarely changed once approved; it is not a living document requiring periodic updates.

Change requests are submitted as discrete events and are not documents that are maintained on an ongoing basis.

The project management plan integrates all subsidiary plans (scope, schedule, cost, quality, risk, communications, etc.) and is formally updated whenever approved change requests affect any of those baselines. Because it governs how the project is executed, monitored, and controlled, it requires ongoing attention and periodic updates throughout the project lifecycle. All other documents are typically updated less frequently or are static once approved.

The communication plan is a subsidiary of the project management plan and while it can be updated, the broader project management plan is the primary document requiring ongoing maintenance.

The project statement of work (SOW) defines the product or service to be provided and is typically finalized early in the project; it does not require periodic updates in the way an integrated plan does.