Why are use-cases counted separately from the other views in the 4+1 architecture?
How are use-cases different from others views?
Asked
Active
Viewed 522 times
2
Christophe
- 81,699
NK-cell
- 139
1 Answers
5
The 4+1 approach to software architecture has 4 different but complementary views on the systems internals.
The 5th view (+1) differs from the others, as it’s about the system’s externals: the uses cases are about the goals of the system’s actors and how the system fits in the larger picture.
Not related: One could wonder why it’s not called 1+4 instead of 4+1, considering that the other views are difficult to envisage without knowing anything of the goals, the user’s expectations and the needs to address. I guess it’s because it’s called the “4+1 architectural view models” and not the “1+4 software engineering view models” ;-)
Christophe
- 81,699