It may be that both sides are correct, although not completely. If the use
case is large, you may want to divide it into logical units of work in which
each describes a meaningful interaction with the user and produces a result.
You may have to adjust your concept of result, to a more intermediate form.
Also, you may need to adopt the "invokes" and "precedes" relationships
between use cases, Rosenberg. The key things to remember are that whatever
you do, it should provide value, be useful and be easy to understand.
Hope that helps.
Gary
Gary E. Sibbitts
Object Technology Specialist
The Federated Software Group, Inc.
-----Original Message-----
From: Eric D. Tarkington [mailto:[EMAIL PROTECTED]]
Sent: Monday, November 27, 2000 11:04 PM
To: ROSE_FORUM
Subject: (ROSE) Bar Bet #1
There is a collegial dispute between some of the instructors here at
Seneca. I won't tell you which side I'm on, but your comments would be
welcome. You can rest assured that I will pass them on -- if they
support me, of course.
Position A: One instructor says that you can't split a use case into
scenarios that cover less than a *complete* path through the FOE. This
agrees with Quatrani (start of chapter 5, VISUAL MODELLING), but may
produce long, awkward scenarios, and long, wide sequence diagrams.
Position B: The other says that's not good software practice, and
scenarios need to capture a small, natural unit of work in the FOE.
This contradicts Quatrani, but produces shorter scenarios with easier
sequence diagrams. One argument against is that the decomposition into
smaller scenarios may be confusing.
So, whadaya say? Do you favor position A or position B? Why?
-Eric
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