Management Body of Knowledge (Pmbok Guide) Fourth Edition continues the tradition of excellence in project management with a standard that is even easier to understand and implement, with:
improved consistency and greater clarification
standard language incorporated throughout the document to aid reader understanding.
new data flow diagrams that clarify inputs and outputs for each process
greater attention placed on how Knowledge Areas integrate in the context of Initiating, Planning, Executing, Monitoring & Controlling, and Closing process groups
two new processes: Identify Stakeholders and Collect Requirements.