Decision trees are a comprehensive tool for modeling all possible
decision options. While influence diagrams produce a compact
summary of a problem, decision trees can show the problem in greater
detail. Decision trees describe events in chronological order but can be
much larger than influence diagrams.
Nodes. As with influence diagrams, decision trees also have
nodes. In PrecisionTree, decision nodes are drawn as green
squares and chance nodes as red circles. However, the payoff
node is now called an end node and is represented with a blue
triangle. Two additional nodes (logic and reference) are
available for advanced model making.
Branches. Decision trees do not have arcs. Instead, they use
branches, which extend from each node. Branches are used as
follows for the three main node types in a decision tree:
Types of nodes in a decision tree include: