Based on a review of A Guide to the Project Management Body of Knowledge (PMBOK Guide) and evaluation of The Project Business Case section of Chapter 3 of the textbook, describe your approach to a successful development of a project business case required in an initial phase of a project. Then discuss at least three key elements of a project business with a major role in the project success. End your discussion post with describing a tool that is typically used to establish and communicate a project business case.