The PMBOK is an indispensable reference for Project Managers (the basis for certification of Project Managers at the Project Management Institute - PMI):
Citando:
The PMBOK as described in the Guide is intended to be "subset of the project management body of knowledge that is generally recognized as a good practice. 'Generally recognized' means the knowledge and practices described are applicable to most projects most of the time and there is a consensus about their value and usefulness. 'Good practice' means there is a general agreement that the application of the knowledge, skills, tools, and techniques can enhance the chance of success over many projects."
