A decision tree is a diagramming tool that aids in making decisions. Generally, the tree begins at a single point from which you must choose among a small number of options. Often, this point is a question that you answer ‘yes’, or ‘no’. Answering ‘yes’, leads down one path, ‘no’ another, each path leading to its own new juncture. After several choices, you find yourself at some end point. Overall, the branching pattern and many possible paths may make the diagram resemble a tree.