Re: What is Data Model FOR?

From: <dr-jekyll_at_att_dot_net>
Date: Thu Apr 29 2004 - 08:47:40 CDT

>I, for one, know what a Data Model is, and I've even taught how to make them at
>several universities, including at courses at universities overseas.

>Right now, I'm worry about basic architecture and high level
>description of what we're proposal to build.

I've also taught (Adjunct) as well as practiced Systems Analysis. I even introduced Data Modeling into the Systems Analysis courses. It beat the blazes out of the old Data Flow Diagram approach (Remember Gane & Sarson, Yourdon, etc?).

When we first introduced Systems Analysis and Design using Data Modeling and Process Modeling at Digital Equipment Corp in the early 1980's, I was part of one of the cutting edge groups. Consequently, I was on one the first projects (probably the first) to use that methodology. When we won a corporate-wide award for excellence for the implemented system, many people studied the system we built as well as the methodology we used for building it. Among the many things we learned were:

1) How important it is to define and document the data requirements early on in the project,
2) You don't have a Data Model, a Process Model, or a plan of any kind unless it is documented and reviewed,
3) How much faster the development was and how much lower the error rate was by using the Data Model and Process Model approach.

IMHO we can't afford not to define a Data Model and work the Process Model specs from it.


= The content of this message, with the exception of any external
= quotations under fair use, are released to the Public Domain
Received on Fri Apr 30 23:17:21 2004

This archive was generated by hypermail 2.1.8 : Fri Apr 30 2004 - 23:17:29 CDT