The most recent edition of PMBOK is 4th edition which is the revised and improved version of 3rd edition. Project managers usually use the PMBOK as a reference tools, knowledge, and processes for ensuring the successful completion of a wide range of projects. When preparing for Certified Associate in Project Management (CAPM) certifications and Project Management Professional (PMP) candidate must refer PMBOK as it being the industry standard.
The project manager should have a complete knowledge of the processes concerned with successful project management. For getting help one should refer to the PMBOK (4th edition) which has focused more on clarifying process interactions. 4th edition PMBOK clearly explains the data flow diagrams, process inputs and outputs and the associations between these processes. With the help of this PMBOK the project managers will have a good understanding of these tools and get benefit out of it.
PMBOK also made it easy to differentiate contents of the scope statement and project charter. PMBOK has done well by making Progressive elaboration consideration which is an important part of project management and also define what is annotated in the charter will develop and become clear in the project scope statement ; it also defines more clear borders between these two documents.
The PMBOK 4th edition also contains a discussion of interpersonal skills required to effectively manage projects. PMBOK also specify areas in which project managers must sustain their focus while interacting with their stakeholders and project teams. The PMBOK 4th edition represents a major enhancement and other steps in the right path for project management certification.