So, you’ve sat down and written out a detailed use case description for the first part of the case study. You’ve drawn your Use case diagram with cute stick figures and bubbles for the use cases. (Not forgetting the automation boundary of course!) Now you’re moving on to the next question.
A Sequence diagram (oddly the 2006 exam seemed to think that s was a vowel- “an sequence diagram):
- Remember, this is the one with the boxes for objects, an actor on the left hand side, and vertical dashed lines (lifelines) descending from each one.
- Remember that the time scale is vertical, so if a message is passed before another one, it needs to be above it on the diagram.
- Look for the messages (methods) that will be passed: look at the flow of activities in your Use Case diagram.
- What objects do you need? It’s a first cut sequence diagram for the exam (I think) and the 2006 exam is a full 3 layer sequence diagram so you won’t need Data Access Objects, but you will need a boundary object (interface) a handler and other objects.