The PMBOK9(r) 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 has been incorporated throughout the document to aid reader understanding.
* New data flow diagrams clarify inputs and outputs for each process.
* Greater attention has been placed on how Knowledge Areas integrate in the context of Initiating, Planning, Executing, Monitoring & Controlling, and Closing process groups.
* Two new processes are featured: Identify Stakeholders and Collect Requirements.