Which execution specification is automatically added in sequence diagrams?
For modeling sequence diagrams, you can use the Options dialog to specify that a bar is automatically added for an action execution specification or a behavior execution specification when a message edge is placed (ARIS > Options > Designer > UML2 modeling, Automatically add execution specification check box).
You can also enable or disable this option using the Add execution specification button on the Contents tab bar.
The execution specification is added depending on the source and target:
If the source is a lifeline, a bar is created if the message is of the Asynchronous call message, Synchronous call message, Asynchronous signal message, or Create message type.
If the target is a lifeline or an execution specification, a bar is created if the message is of the Asynchronous call message, Synchronous call message, or Asynchronous signal message type.
If the target presentation is an execution specification, the type of the new bar added is the same, either Action execution specification or Behavior execution specification. If not, the type of the new bar added is Action execution specification.