[Year 12 SofDev] Resource flows in a DFD

[Mark Kelly]

Yes.  I suppose the undercurrent of my question was: we are teaching 
kids not to put something into a DFD.  But this seems at variance with 
what is done in The Real World.

Ergo, are we massaging reality to suit ourselves in VCEIT Land, or 
should we be teaching kids what is actually done in TRW?

Kevin Feely wrote:
> Hi mark,
> In all of the exercises i have done with context diagrams (level 0) and 
> DFD's (mainly level 1 and only discussion about level 2) i have always 
> said only data (information) should be represented. That the DFD is not 
> concerned with the actual goods ordered or purchased for example, but 
> the information these transactions generate.
> I suppose this is because we are modeling information systems using the 
> DFD tool.
> I suppose it is possible to model physical systems with the DFD as well 
> ( obviously from your link!) but  iam not sure they should be intertwined.
> That is if a student represents a physical transaction on my information 
> DFD i would regard that as an error.
> regards
> Kev
> 
> Mark Kelly wrote:
>> 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
>>
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-- 
Mark Kelly
Manager - Information Systems
McKinnon Secondary College
kel AT mckinnonsc.vic.edu.au
McKinnon Rd, McKinnon 3204, Victoria, Australia
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