A Guide to the Project Management Body of Knowledge (PMBOK), created by the Project Management Institute (PMI), is the sum of knowledge within the profession of project management. The complete Project Management Body of Knowledge includes proven traditional practices that are widely applied, as well as innovative emerging practices for the profession with widespread consensus as to their value and usefulness.
The PMBOK framework consists of five process groups, ten knowledge areas and 48 project management (PM) processes. The knowledge areas group the PM processes by project management content.
The process groups (Initiating, Planning, Executing, Controlling and Closing) organize the more detailed PM processes over time. Therefore, the process groups represent project states at various different times from start to finish.