> ----------
> From: Maheswari Subburaman[SMTP:[EMAIL PROTECTED]]
> Reply To: Maheswari Subburaman
> Sent: 27 February 2001 15:34
> Cc: '[EMAIL PROTECTED]'
> Subject: Re: (ROSE) "System" as Actor
>
>
> Hi Everbody,
>
> Since so much discussion about Actor and System
> let me give some of my opinions.
>
> I can not understand , how people consider
> Printer as an actor.Then even one day developers
> will start to feel monitor , keyboard all as actors.
> They are just the means to display or render
> output to the user(Actor) and to accept input from
> the user(Actor), they themself are not actors.
>
Watch out, Maheswari. In the context of business applications, your argument
may be right more often than not. Not all of us are working with business
applications, though.
What would you do if you were writing a printer driver?
A graphics driver? What is an actor for DirectX (not that I expect Microdoft
to have done use cases for it).
Is an engine management system's actor the driver or all the pedals, valves,
gauges and contacts?
> One more thing considering the system under
> development as Actor. Then even you will start
> to feel the hardware used to develope a system
> like Monitor , CPU and keyboard all as Actor.
>
> There are very clear definitions of System , Actor and Use Case.
> Just you have to read well and think twice , then sit for
> the Use Case model. Then no such confusion in future.
>
Indeed.
System is the bit you are designing.
Actors are all those nasty outside bits over which you have no control.
Use cases tell you about how these two worlds try to outwit each other.
> Maheswari
>
>
Regards,
Huseyin Angay
Karabash Ltd.
www.karabash.co.uk
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