Final answer:
The Project Integration Management knowledge area primarily focuses on developing the project management plan, which is a comprehensive document outlining the execution, monitoring, and control of a project.
Step-by-step explanation:
The Project Integration Management knowledge area in project management focuses on coordinating the various elements of a project. The main deliverable developed in this area is the project management plan. This plan is a formal, approved document that defines how the project is executed, monitored, and controlled. It may include plans for project scope, cost, schedule, quality, communication, risk, procurement, and stakeholder management, all integrated into a coherent whole. The Work Breakdown Structure (WBS), schedule management plan, and quality management may be components of the project management plan, but they are developed under their respective knowledge areas.