Choose a Flow Action

Whenever a flow takes place in either direction, the procedure step the flow initiates will begin in one of the following ways:

It can show the display associated with the destination procedure step and wait for user input to begin the logic of the procedure step.
It can execute the logic of the procedure step, which results in either the procedure step's display being shown or a dialog flow being executed.

This distinction relies on the definition of a flow action associated with each procedure step.

The guidelines for determining flow action are quite simple:

If the destination procedure step requires information from the user before it can execute, use the Display First option.
If the source procedure step provides all the information required by the destination procedure step, use the Execute First option.