Just a quick lesson learned -- I just completed
SCEA Part 2 with a score of 88, and I spent only about 20 hours working on the assignment.
I've read a few posts on this forum suggesting spending weeks of work and creating pages of documentation. However, my experience is that the Cade book is invaluable for helping one pass Part 2 with just the right amount of effort -- not too much and not too little.
I submitted diagrams that closely resembled the style and content of the Cade example diagrams, and I submitted approximately a single page of assumptions (and they were truly assumptions, not documentation of all my diagrams).
So, for those who have a good background in UML and typical
J2EE web application flow, studying Cade's examples for Part 2 should help you pass without too much trouble.