UML-SSD summary

1, all scenes do not need to draw SSD . The scene required painting SSD:

1 ), the main success scenario
 2 ), the frequent scene
 3), complex scenes

2. Role

1 ), participants 
2), the system (no class, i.e., black box)

3, painting SSD time not too long, generally a few minutes, or 30 minutes can be.

4, SSD model belongs embodiment with a part .

 

5, when you build a SSD?

Not in the initial stage, but in the refinement stage