Use the Upper Level Decision Tree window to configure all but the lowest level of the treatment decision tree shown in the left pane of the Selection tab of the Decision Trees Window. This window defines the upper portion of the decision tree for treatments where, typically, the type of road surface (for example, asphalt or concrete) and road functional class (for example, interstate, primary, or secondary) are defined and related to each other. (The lower portion of the decision tree for treatments, where specific road conditions such as roughness or traffic count determine a treatment, are configured in the Decision Trees Window.)

When this window is displayed, the system only displays a portion of the decision tree. You can view other parts of the decision tree by holding down the mouse key and then dragging the decision tree as desired. You can also change the magnification by using the wheel on the mouse.

Right-click Shortcut Menu Commands

When you right-click a node in the hierarchy, the system displays a shortcut menu with the following special commands:

• Add Branch: This command adds a node or nodes as children beneath the node you right-clicked. After selecting this command the system displays a dialog box so you can enter the number of nodes needed.
• Edit Decision Var Limits: This command is only available for nodes that have children. After selecting this command, the system displays a new window in which you select the variables and values that determine which tree branch will be selected. The set of decision tree variables that can be selected are configured in the Upper Level Decision Tree column in the Setup PMS Analysis Columns window.
• Edit Node Name: This command displays a dialog box so you can edit the name of the node.