I fully agree with you, Gary.
In many ways how the user gets access to the system is more of the
"suplementary requirement" kind of requirement. I.e. nothing that
necessarely gives "value to the user", but is a requirement nevertheless.
Hence it migth be left out as a Use-Case all together, and added to the
model when starting the design (Use-Case realizations etc.). It is important
as you point out, that one only model functional requirenments that returns
something of value from the system to the user as Use-Cases, and leave the
rest for later. This is also the only way of ever keeping your number of
Use-Cases down at a preferrable level (I think RUP states a maximum of 20 or
so ?).
Regards
Arne
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> Sent: Monday, July 02, 2001 4:10 PM
> To: Styve, Arne
> Cc: Jie Zhao; '[EMAIL PROTECTED]'
> Subject: RE: (ROSE) Logon and Logout Use Case
>
>
>
>
> There is a school of thought that says these two items should
> NOT be use cases.
>
> Use cases should make a case for using the system. I
> typically don't use a
> system to login or logout, I want to get something of value
> from the system.
> Many times, login is shown as a precondition to the other
> use-cases. Granted,
> you'll need to acknowledge these in some way, but I don't
> know if you would want
> to have them as their own use-cases.
>
> Just my two cents worth, but I know there are a lot of
> disagreements over this
> issue.
>
> -GLH
>
>
>
>
>
> "Styve, Arne" <[EMAIL PROTECTED]> on 07/02/2001 06:15:02 AM
>
> Please respond to "Styve, Arne" <[EMAIL PROTECTED]>
>
> To: Jie Zhao <[EMAIL PROTECTED]>, "'[EMAIL PROTECTED]'"
> <[EMAIL PROTECTED]>
> cc: (bcc: Gary Hayes/Jeppesen/TMC)
>
> Subject: RE: (ROSE) Logon and Logout Use Case
>
>
>
>
>
> I think I would have operated on a slightly higher level when defining
> Use-Cases. I think I would have had a Use-Case called "User Access" or
> something similar, and then used an activity-diagram to describe the
> activities involved in conjunction to the user accessing the
> system, where
> two of the possible activities would be "User Logon" and
> "User Logout".
> Supplied with a couple of sequence diagrams showing the sequence of
> operations involved between the user and the system (as a
> black box), this
> Use-Case would be quite good.
>
> I have seen examples of this type of Use-Case, but I cannot
> remember exactly
> where, at the moment. Sorry.
>
> Hope this was of help :-)
>
> Regards
>
> Arne Styve
>
> > -----Original Message-----
> > From: Jie Zhao [mailto:[EMAIL PROTECTED]]
> > Sent: Monday, July 02, 2001 11:09 AM
> > To: '[EMAIL PROTECTED]'
> > Subject: (ROSE) Logon and Logout Use Case
> >
> >
> >
> > Hi,
> >
> > Should "Logon" and "Logout" be use cases? It seems all
> > systems have these
> > two special use cases.
> >
> > Jie
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