Re: Data Flow Diagrams

Subject: Re: Data Flow Diagrams
From: Tony Markos <ajmarkos -at- yahoo -dot- com>
To: "TECHWR-L" <techwr-l -at- lists -dot- techwr-l -dot- com>
Date: Fri, 29 Oct 2004 10:19:09 -0700 (PDT)

--- Janet Swisher <swisher -at- enthought -dot- com> wrote:

For those of you still wondering what a DFD is, here
is a chapter with

Tony Markos responds:

Thanks Janet. The Yourdon methodology is great!

Yourdon is a real street fighter. His approach: rapid
iterations. Thats why the curved lines in Yourdon
DFDs: Don't take the time to draw straight lines;
quickly, with pencil, draw curved lines and then get
back out there with the user and walk through your
latest iteration.

For those who say that I am too gun-ho about DFD's, I
remember when I went through the Yourdon course on
DFDs. Our instructor was like a firery evangelical
Pastor. He would stand in front of the class and wave
a copy of Yourdon's "Gospel" above his head, as he
passionately espoused the principles of DFDs.

I used to converse with a lady who was a former
Yourdon instructor. She referred to those who
followed "the word" as people who have the "Yourdon
fervor." To face the dangers of DFDing that I
referred to in a previous posting, one has to be very
fervent about DFDing - and the Yourdon people know it.

Tony Markos

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Data Flow Diagrams: From: Janet Swisher

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