You can use a Node Tree diagram to view the hierarchical relationship between Operational Activities in a nesting of parent-child OV-5 diagrams of a model.
The following image shows an example of a OV-05a diagram.
On this diagram, you can draw Activities in a hierarchy, joining them with the ActivityPartOfActivity line.
Note To easily align the lines underneath the parent symbol, you can turn on, and adjust, the diagram grid. With the diagram open and in focus, select Format > Diagram Format > Grid and Reduce View to open the Grid & Reduced View Settings dialog box, and then Line Grid.
