For the condition attribute selected in the Attributes pane, the Performance Model Tree pane shows what models are assigned to the different nodes of the decision tree. The box representing each node shows the assigned model: unless no model is assigned, in which case the decision variable used in selecting the node is displayed. (If you hover over a node, the system will display the decision variable and value that causes that node to be selected.)

When this pane 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 decision tree, the following special commands are available:

• Analyze: This command displays the Analyze Model window, which shows a time versus condition graph of the model assigned to the selected node and where you can perform regression analysis. (If no model is assigned to the node, the system uses the model currently selected in the Models pane.) See Analyze Model for more information.
• Disassign Model: When a node has a model assigned to it, this command disassociates the model from the node. (Note: If you want to replace an existing model, you can use the Set Selected Model for this Node command. The new selection will then replace the node's current model assignment with a different model assignment.)
• Protect/Release Model: Provided you have sufficient authority, you can "protect" the assignment of a model to a node. This means that the assignment cannot be changed until the protection is released (by you or someone with sufficient authority). Once a model assignment is protected, an asterisk (*Model Name) appears before the start of the model name. If you do not have sufficient authority, or if a model is not yet assigned to the node, this command is not available.

• Set Model for Children: When all child nodes of a parent would use the same model for the selected condition attribute, you can right-click the child nodes' parent node and use this command as a shortcut to assigning the model to each child node.

  Note: The parent node must have a model already assigned to it before using this command. (If no model is configured for the parent node, this command is not available.)

• Set Selected Model for this Node: For the condition attribute selected in the Attributes pane, this command assigns the model selected in the Models pane to the decision tree node that you right-clicked. If a model is already assigned to this node, the new selection replaces the previous selection. If a model is already assigned to this node, but is protected, and the system displays an error message when you select this command because you cannot assign a model to a protected node.