The Tree Diagram takes a broad goal or idea and narrows it down into specific assign"ment, tasks or options. The systematic plan of attack provided by a Tree Diagram makes sure that no small task gets forgotten. In the process of creating the diagram, new and helpful ways to work towards the ultimate goal often emerge.
Begin with the major job or goal. Think of the main tasks that must be completed in order for the ultimate goal to be achieved. The main goal should branch off into these tasks. Do not make them overly specific as of yet. A Tree Diagram should progress from general to more specific with each level. Think of what needs to be done (or what could be done) to complete each task. These requirements and/or options should branch off from each task. Continue to create increasingly specific levels of the tree until you feel you have an exhaustive listing.
An excellent source of additional information on this Management & Planning Tool is The Memory Jogger Plus +, by Michael Brassard (Goal/QPC, 1989).