In the case of the example, we showed some relationships between the use cases. When the use case, it has already indicated the operational relationship between the two use cases, which is the first refinement of include, extend et al. Or is realization.
Then when the timing chart is drawn, it is necessary to consider the secondary refinement of this fine in the use case, this refinement will determine what technology is implemented by the two sub-packages or the modules. Interface or communication or other.
I think, talk about it, you should understand how to do it?
