Final answer:
The planning process within the Project Scope Management knowledge area is the creation of a WBS management plan.
Step-by-step explanation:
Creation of a WBS management plan is a planning process that is within the Project Scope Management knowledge area. The Work Breakdown Structure (WBS) is a key project deliverable that organizes the team's work into manageable sections.
The WBS is a hierarchical decomposition of the total scope of work to be carried out by the project team to accomplish the project objectives and create the required deliverables.
The WBS management plan outlines how the WBS will be defined, prepared, structured, and maintained. It is distinct from schedule development, which pertains to the Project Time Management knowledge area, quality planning, which is associated with Project Quality Management, and is not to be confused with the more general developing a project, which is an overarching activity that includes numerous processes across different knowledge areas.