Direct and Manage Project Execution is one of the 42 project management processes described in the fourth edition PMBOK®. It’s one of the six Integration knowledge area processes, and one of the eight Executing processes. The purpose of this process is to actually perform the project work described in the Project Management Plan. The key input is the Project Management Plan, as that provides the guidance for performing the work. Expert Judgment is used in carrying out the work. During the course of performing the work, Change Requests will arise. This process interacts with the Perform Integrated Change Control process to manage these requests. If a Change Request is approved through the Perform Integrated Change Control Process, this Approved Change Request then becomes an input to Direct and Manage Project Execution. The primary output is Deliverables, which demonstrates the importance of this process. Of the 42 processes, this one is most affected by the application area. Whereas planning and documenting will be similar across all projects, the actual work performed will vary tremendously.
