You can create a node tree diagram to view the hierarchical relationship between Operational Activities in a nesting of parent/child diagrams of a model.
1 Click File > New Diagram or select Diagrams in the All Methods tab in the explorer, right-click it, and select New.
2 In the Select new type for All Methods dialog box, scroll down and double-click NOV-5 Node Tree.
3 Type a name; then click OK.
The diagram is created.
4 To automatically generate a node tree inside the diagram for an operational activity, complete the following steps:
▪Click Draw > Decomposition.
▪In the Select for Node Tree Generation dialog box, in the box containing the list of diagrams, find the starting diagram for the tree (generally the Context diagram); then click the expand symbol (+) at the left side of the diagram name.
▪Select the Operational Activity symbol that you want to decompose; then click Build.