Project management is one part resource planning, one part psychology. Waterfall is what happens when you slide all the way toward resource planning and ignore

Project management is one part resource planning, one part psychology. Waterfall is what happens when you slide all the way toward resource planning and ignore the psychological side of the house. Kanban is probably the farthest to the psychology side you can get in a productive manner. Scrum is somewhere in the middle, but the bigger the organization the more they try to steer towards waterfall. What a lot of business fail to recognize is that different strategies match different businesses. Scrum is a great fit for contract companies with multiple clients. In a larger company where you are continuously building one project, you need to be able to move as fast as your developers can go. That generally means Kanban.