Which model? - Sequence diagram, activity diagram

[ehsun7b]

I want to draw sequence and activity diagrams for my project. I don't know where should I draw them. I have drawn my use case and class diagrams in use case model and class model respectively, but I can not find out now which model is appropriate for Activity and Sequence diagram? Maybe Business model?!!!  

[«Midnight»]

Search this forum - there are some good suggestions, and you'll get a sense of the considerations that affect the decision.

What you will quickly notice is that you'll have to make your decisions based on the merits of your particular situation.

As before, the forum is a good place to start. Then you will at least know what questions to ask as you widen your research.

Short term advice. Don't panic.