Final answer:
The Planning Process Group includes various Knowledge Areas such as scope, schedule, cost, quality, resources, communications, risks, procurement, and stakeholder management, which are crucial for effective project planning according to PMI's PMBOK.
Step-by-step explanation:
The Knowledge Areas within the Planning Process Group are essential components for ensuring successful project management. They encompass integral the plan management, scope management, schedule management, cost management, quality management, resource management, communication management, risk management, procurement management, and stakeholder management. Often utilized in the context of the Project Management Institute (PMI)'s Project Management Body of Knowledge (PMBOK), these areas guide the comprehensive planning that is crucial to establish and maintain a project that is well-managed, meets its objectives, and is completed on time and within budget.