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how to show "if" conditions while using usecases?
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Posted By:   S_Shreya
Posted On:   Thursday, June 14, 2001 11:02 AM

Hi,
I want to know how to represent if conditions while capturing
system requirements using usecases in Rose98. My problem is
that depending on a test for whether an object of interest is
moving or stationary, a particular sequence of operations must
be performed. Then, the result must be used to update the
relevant data. Then this updated data must be sent to another
usecase for taking further action.

Thanking you,

girija.

Re: how to show "if" conditions while using usecases?

Posted By:   govindaraj_venugopalan  
Posted On:   Monday, August 6, 2001 06:15 AM

You can represent end to end process through use case.I feel we can't use condition on use case. use case supports extends and uses streotype.
use case is not showing any flow of activites. the best choice is activity diagram to show if conditions.

Re: how to show "if" conditions while using usecases?

Posted By:   Andres_Vignaga  
Posted On:   Thursday, July 26, 2001 10:07 PM

The only conditional I know in use cases are extensions. An extension point has an associated condition. Reaching that point, the condition is evaluated, and if satisfied the extension occurs.

Your description matches best with an algorithm. Did you consider using activity diagrams? You can get conditions, operations performed, object flows and even signals sent and recieved.
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