===== Message Sequence Chart (MSC) =====

Message Sequence Chart (MSC) is commonly used to represent the dynamic behaviour between two processes or applications. These inter communications can be found in most of the applications and systems. //TestOptimal// uses MSC to visualize these dynamic behaviours. Below is an MSC that describes the transition traversals of a model execution:

{{http://testoptimal.com/img/SeqMSC.jpg}}


In the above MSC, each message represents a transition traversal a source state to a target state.

Complex test scenarios may involve multiple models to synchronize and communicate together. The following are examples of inter-model operations:

  - setting user variables remotely in another model execution
  - sending signal to activate a state in another model execution
  - sending signal to trigger a transition in another model execution