Flow Control 
In the tree structure you have multiple options to affect the sequence of the procesisng of the form:
Using Output Conditions you make the processing of nodes and subnodes dependent on conditions.
Using a condition you determine the Alternative Execution of two subnodes
Using a loop it is possible to process outputs repeatedly
Using a command you define the flow of the pages dynamically
NoteThe section Rules for Processing a Form describes how Smart Forms process the form logic.
End of the note.