This book is written to be consistent with the standards and principles of the Project Management Institute and the Project Management Body of Knowledge (PMBOK) as much as possible. However, my desire is to present best practice perspectives, techniques, and tools, which may differ from PMI's approach. It should be remembered that PMI's standards are based on how most professional project managers view project management. At the same time, PMI recognizes that project management is not entirely prescriptive and that there are other solutions to management problems. I have endeavored to note any such differences of opinion, but it should be remembered that, for purposes of preparing for the PMP examination, PMI's viewpoint prevails.