PreRequisite Tree - a Theory of Constraints Thinking Process

PreRequisite Tree - a Theory of Constraints Thinking Process
The PreRequisite Tree is a Theory of Constraints planning tool that actually uses Obstacles as levers to achieve the end result

Often, the obstacles to achieving something appear to be so large as to make it appear beyond reach. Or at least, to make the path so difficult that it is not easy even to see where to start. Both of which are primary causes of procrastination, of course.