Re: From class diagram to physical data model : conceptual data model or not ?

On 29 mai, 17:53, zejea..._at_gmail.com wrote:
> Hello,
>
> Our developers use UML and make class diagrams (A).
>
> Our DBA team wants to make physical diagrams with powerdesigner (B).
>
> >From (A) to (B) we can :
>
> - create a data model diagram (ER) and derive it in its physical form
>
> - or directly create the physical diagram provided the class diagram
> is complete
>
> After all, what is the point of making an ER conceptual diagram when
> the class diagram so much resembles it.
> (entity <=> class, ...)
>
> What would be your advice ?
>
> This is certainly a naive question ... don't be too harsh =)
>
> Thanks in advance
>
> Jean-Michel

If you can't make the difference now try to bring your team to show you the difference on the complete life cycle...

Ask both your DBA's and developpers the following questions:

> How do you plan on impementing business logic (choose examples)
> How do you plan on maintaining the system over a 2 years period
> Could give me a ROI 2 years plan for the system you are planning to design
> How will maintain data integrity
> Whart is exactly to to you *performance* (tip: if one just answers *response time* just kill the answer)

The most convincing answer should demonstate who has bee giving more thought about this...

Hope this helps... Received on Thu May 31 2007 - 21:54:48 CEST