[Yr11 Information Technology] Data Flow Diagrams

[Litsa Tzelepis]

hi mark,

i was going by the definitions in the book, but that's how i got taught 
these diagrams at uni too - context diagrams are a representation of the 
info. system without the inclusion of storage files, and the level 0 diagram 
is when the files are also drawn in and each process is labelled, 1, 2, 3, 
etc. Level 1 diagrams are when the bubbles are broken down further and 
labelled 1.1, 1.2, 1.3, etc. And so it goes..

sorry if i have confused anyone, litsa


----- Original Message ----- 
From: "Mark Kelly" <kel at mckinnonsc.vic.edu.au>
To: "Year 11 Information Technology Teachers' Mailing List" 
<yr11it at edulists.com.au>
Sent: Thursday, September 04, 2008 12:20 PM
Subject: Re: [Yr11 Information Technology] Data Flow Diagrams


> I've always believed context diagrams WERE Level 0 DFDs...
>
> Googling seems to confirm it.
>
> Robert Minato wrote:
>> Thanks for the reply Laurie and Litsa
>>
>> Don't have IT at work in our library but I like Litsa's idea of only going 
>> to Level 0.
>>
>> Thanks for the suggestions
>>
>> Rob
>>
>> Robert Minato
>> Technology Domain Leader
>> Catholic College Wodonga
>> 02 6043 5546
>>
>>
>>
>>
>>
>> On 03/09/2008, at 10:57 AM, Litsa Tzelepis wrote:
>>
>>> hello.
>>> i also use potts, but i have the jacaranda text for the occassional 
>>> backup.
>>> if you have this text, try go to page 255 - 258. this should help.
>>>  i teach context diagrams and then level 0 - i then discuss level 1, 
>>> level 2, etc. but tell the students they only need to worry about the 
>>> context diagram and level 0.
>>>  hope this helps, litsa
>>>
>>>     ----- Original Message -----
>>>     *From:* Robert Minato <mailto:rminato at ccw.vic.edu.au>
>>>     *To:* Year 11 Information Technology Teachers' Mailing List
>>>     <mailto:yr11it at edulists.com.au>
>>>     *Sent:* Wednesday, September 03, 2008 7:57 AM
>>>     *Subject:* [Yr11 Information Technology] Data Flow Diagrams
>>>
>>>     I'm preparing for DFDs, something I've not taught before. The
>>>     Potts text give two pages of, too me, brief cover. When I look at
>>>     the DFD examples on the VITTA support cd, I feel I'm way short of
>>>     knowing much about them. Context/level 0 diagrams are fine, but
>>>     going further seems to leave a lot of interpretation to the
>>>     imagination. Given that my students aren't very worldly, I don't
>>>     expect them to grasp the topic very easily.
>>>
>>>     How deep are we expected to cover DFDs? The study design
>>>     lists: tools for representing data flows, including data fl ow 
>>> diagrams.
>>>
>>>     Does anyone have any notes to better exp! lain level 1 and level 2?
>>>
>>>     Regards
>>>
>>>     Rob
>>>
>>>     Robert Minato
>>>     Technology Domain Leader
>>>     Catholic College Wodonga
>>>     02 6043 5546
>
>
> -- 
> Mark Kelly
> Manager - Information Systems
> McKinnon Secondary College
> McKinnon Rd McKinnon 3204, Victoria, Australia
> Direct line / Voicemail: 8520 9085
> School Phone +613 8520 9000
> School Fax +613 95789253
> kel AT mckinnonsc.vic.edu.au
>
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>
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>
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