[Year 12 SofDev] Resource flows in a DFD

[Timmer-Arends]

Mark and Adrian

Like you I've not heard of this so I  did a quick google on "context
diagram"+resource flow"

Found quite a few references - they all seem to point to the idea of DFDs
being expanded to include production and business modelling; for example:

Google books:
"Process Oriented Analysis: Design and Optimization of Industrial Production
"
By Urs B. Meyer, Simone
E. Creux, Andrea K. Weber Marin

http://www.edrawsoft.com/Design-Data-Flow.php
quote: "Data flow diagrams can be used to provide a clear representation of
any business function..."

So I don't think SD has anything to worry about since it is looking only at
information systems. And therefore we should only be looking at data flows.

I did find this PPT though, which doesn't do a bad job of DFDs (plus other
business related stuff). It used Gane&Sarson conventions rather than
DeMarco, but could be a good teacher resource if nothing else.
www.computing.dcu.ie/~renaat/ca2/ca214/DataFlowModels.ppt

Regards
Robert T-A


----- Original Message ----- 
From: "Mark Kelly" <kel at mckinnonsc.vic.edu.au>
To: "Year 12 Software Development Teachers' Mailing List"
<sofdev at edulists.com.au>
Sent: Monday, April 14, 2008 1:12 PM
Subject: [Year 12 SofDev] Resource flows in a DFD


>I can't remember seeing a resource flow in an SD DFD, but apparently they
>exist (e.g. http://www.getahead-direct.com/gwba03-context-diagram.htm)
>
> Are they deliberately avoided in SD or are they not industry-standard?
>
> Cheers
> Mark
>
> -- 
> Mark Kelly
> Manager - Information Systems
> McKinnon Secondary College
> kel AT mckinnonsc.vic.edu.au
> McKinnon Rd, McKinnon 3204, Victoria, Australia
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>
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