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<p class="MsoPlainText"><a name="_MailEndCompose">Strictly speaking as someone who did DFDs at uni…</a></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">As Mark has said, we sometimes think in a human sense however DFDs don’t allow us to see the interactions between two EEs.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">As Selina has said, the waiter is just the input method – so we can leave it out. I think our students sometimes find it hard at this stage where they have to decide what should and shouldn’t be included in our DFDs.
</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">In terms of the DFD, you could argue either way for one or the other….but NOT BOTH!
<span style="font-family:Wingdings">J</span></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">That being said, in the UCD you can list both as actors because they both have roles in the system.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">I have a whole text book on this stuff from my 2<sup>nd</sup> year at LaTrobe which I’m using with my kids at the moment…DFDs, UCDs, UML the whole kit and caboodle!</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Regards</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Mr James Vella</p>
<p class="MsoPlainText">MacKillop College</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"> </p>
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<p class="MsoPlainText">Today's Topics:</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"> 1. Re: DFD question (Kent Beveridge)</p>
<p class="MsoPlainText"> 2. Re: DFD question (Mark)</p>
<p class="MsoPlainText"> 3. Re: DFD question (Selina Dennis)</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">----------------------------------------------------------------------</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Message: 1</p>
<p class="MsoPlainText">Date: Sun, 24 Feb 2013 21:57:28 +0000</p>
<p class="MsoPlainText">From: Kent Beveridge <<a href="mailto:kbeveridge@stbc.vic.edu.au"><span style="color:windowtext; text-decoration:none">kbeveridge@stbc.vic.edu.au</span></a>></p>
<p class="MsoPlainText">Subject: Re: [Year 12 SofDev] DFD question</p>
<p class="MsoPlainText">To: "Year 12 Software Development Teachers' Mailing List"</p>
<p class="MsoPlainText"> <<a href="mailto:sofdev@edulists.com.au"><span style="color:windowtext; text-decoration:none">sofdev@edulists.com.au</span></a>></p>
<p class="MsoPlainText">Message-ID:</p>
<p class="MsoPlainText"> <<a href="mailto:64FBC7D59E9D6B4DA547B82B7F07665C739FB287@garlic.stbc.vic.edu.au"><span style="color:windowtext; text-decoration:none">64FBC7D59E9D6B4DA547B82B7F07665C739FB287@garlic.stbc.vic.edu.au</span></a>></p>
<p class="MsoPlainText">Content-Type: text/plain; charset="iso-8859-1"</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Data flow to my understanding here..</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Waiter to Customer ....Request for order</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Customer to Waiter ....Food/Beverage order</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Waiter and Customer both 'entities' send data back to the central part of the 'system' (restuarant system) via the waiter</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Yep actors are waiter and customer.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">I havent started UCD stuff with my guys just yet..focussing on DFD's ...ucd next.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Kent Beveridge</p>
<p class="MsoPlainText">ICT Coordinator & Maths Teacher</p>
<p class="MsoPlainText"><a href="mailto:kbeveridge@stbc.vic.edu.au%3cmailto:kbeveridge@stbc.vic.edu.au"><span style="color:windowtext; text-decoration:none">kbeveridge@stbc.vic.edu.au<mailto:kbeveridge@stbc.vic.edu.au</span></a>></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">________________________________</p>
<p class="MsoPlainText">From: <a href="mailto:sofdev-bounces@edulists.com.au"><span style="color:windowtext; text-decoration:none">sofdev-bounces@edulists.com.au</span></a> [sofdev-bounces@edulists.com.au] on behalf of Mark [mark@vceit.com]</p>
<p class="MsoPlainText">Sent: Saturday, 23 February 2013 7:15 AM</p>
<p class="MsoPlainText">To: Year 12 Software Development Teachers' Mailing List</p>
<p class="MsoPlainText">Subject: Re: [Year 12 SofDev] DFD question</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">I had the same issue with the DFD and UCD for one of the programming outcomes.</p>
<p class="MsoPlainText">The restaurant customer would be an obvious actor/external entity in a system that takes meal orders.</p>
<p class="MsoPlainText">However since the waiter is the one interacting with the system, and the customer is interacting with the waiter, the customer does not appear at all in the system representation.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Sometimes what seems logical is not as it first appears.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">On 22 February 2013 13:14, Simone Tynan <<a href="mailto:Simone.Tynan@shcy.vic.edu.au%3cmailto:Simone.Tynan@shcy.vic.edu.au"><span style="color:windowtext; text-decoration:none">Simone.Tynan@shcy.vic.edu.au<mailto:Simone.Tynan@shcy.vic.edu.au</span></a>>>
wrote:</p>
<p class="MsoPlainText">Hi all,</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">I am having trouble with aspects of a DFD.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">I have a DFD and context diagram in which shows a customer orders a service and it is quoted and carried out.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Similar scenario, except the service is being carried out for a beneficiary. (Think Ninja and assassins. ;-) )</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">The Customer is providing all details and payments. The beneficiary is not actually adding to or receiving from the system (that I can see).</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Are they still added as an external entity? Is there any connection between them and the system?</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Many thanks for any input/</p>
<p class="MsoPlainText">Simone</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">************************************</p>
<p class="MsoPlainText">Simone Tynan</p>
<p class="MsoPlainText">eLearning Leader</p>
<p class="MsoPlainText">LOTE Leader P-12</p>
<p class="MsoPlainText"><a href="mailto:Simone.Tynan@shcy.vic.edu.au%3cmailto:Simone.Tynan@shcy.vic.edu.au"><span style="color:windowtext; text-decoration:none">Simone.Tynan@shcy.vic.edu.au<mailto:Simone.Tynan@shcy.vic.edu.au</span></a>></p>
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<p class="MsoPlainText">--</p>
<p class="MsoPlainText">--</p>
<p class="MsoPlainText">Mark Kelly</p>
<p class="MsoPlainText">mark AT vceit DOT com</p>
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<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Message: 2</p>
<p class="MsoPlainText">Date: Mon, 25 Feb 2013 10:06:18 +1100</p>
<p class="MsoPlainText">From: Mark <<a href="mailto:mark@vceit.com"><span style="color:windowtext; text-decoration:none">mark@vceit.com</span></a>></p>
<p class="MsoPlainText">Subject: Re: [Year 12 SofDev] DFD question</p>
<p class="MsoPlainText">To: "Year 12 Software Development Teachers' Mailing List"</p>
<p class="MsoPlainText"> <<a href="mailto:sofdev@edulists.com.au"><span style="color:windowtext; text-decoration:none">sofdev@edulists.com.au</span></a>></p>
<p class="MsoPlainText">Message-ID:</p>
<p class="MsoPlainText"> <<a href="mailto:CACu=8Z0nWiAPpAFwtphqpdcGrduX+SbCYsErXimTjr9zZhX8OA@mail.gmail.com"><span style="color:windowtext; text-decoration:none">CACu=8Z0nWiAPpAFwtphqpdcGrduX+SbCYsErXimTjr9zZhX8OA@mail.gmail.com</span></a>></p>
<p class="MsoPlainText">Content-Type: text/plain; charset="iso-8859-1"</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Hi all. It's an interesting situation. This is my take on it.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">We all probably start by seeing it from a human point of view: the customer is dealing with the waiter, who deals with the system. So the customer is an integral part of the transaction and therefore appear in a DFD or UCD...</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">But the waiter is not a part of the system: he/she interacts with it as an external entity (EE).</p>
<p class="MsoPlainText">So where does the customer fit in? An EE to the EE waiter? An EE once removed? We don't do that in DFD or UCD.</p>
<p class="MsoPlainText">>From the system's point of view, the waiter is an EE. The customer is a</p>
<p class="MsoPlainText">fictional character that the system does not see, hear, or believe in. Only the waiter exists to the system. Everyone else is Santa Claus.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">We could complicate it further and imagine that a child is giving her meal choice to her mother who gives it to the waiter... should the child be in the DFD/UCD now as an EE twice removed?</p>
<p class="MsoPlainText">If a waiter were ordering his own lunch from the kitchen, would he be represented again in the diagram - this time as a customerless EE?</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">As I read it, the customer is not directly interacting with the system; the waiter is. So the waiter appears as an EE.</p>
<p class="MsoPlainText">So I would not include the customer at all in a DFD or UCD.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Anyone out there who did DFD/UCD at uni?</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Cheers</p>
<p class="MsoPlainText">Mark</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">On 25 February 2013 08:57, Kent Beveridge <<a href="mailto:kbeveridge@stbc.vic.edu.au"><span style="color:windowtext; text-decoration:none">kbeveridge@stbc.vic.edu.au</span></a>>wrote:</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">> Data flow to my understanding here..</p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> Waiter to Customer ....Request for order</p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> Customer to Waiter ....Food/Beverage order</p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> Waiter and Customer both 'entities' send data back to the central part
</p>
<p class="MsoPlainText">> of the 'system' (restuarant system) via the waiter</p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> Yep actors are waiter and customer.</p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> I havent started UCD stuff with my guys just yet..focussing on DFD's
</p>
<p class="MsoPlainText">> ...ucd next.</p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> *Kent Beveridge*</p>
<p class="MsoPlainText">> ICT Coordinator & Maths Teacher</p>
<p class="MsoPlainText">> <a href="mailto:kbeveridge@stbc.vic.edu.au"><span style="color:windowtext; text-decoration:none">kbeveridge@stbc.vic.edu.au</span></a></p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> ------------------------------</p>
<p class="MsoPlainText">> *From:* <a href="mailto:sofdev-bounces@edulists.com.au">
<span style="color:windowtext; text-decoration:none">sofdev-bounces@edulists.com.au</span></a>
</p>
<p class="MsoPlainText">> [sofdev-bounces@edulists.com.au] on behalf of Mark [mark@vceit.com]</p>
<p class="MsoPlainText">> *Sent:* Saturday, 23 February 2013 7:15 AM</p>
<p class="MsoPlainText">> *To:* Year 12 Software Development Teachers' Mailing List</p>
<p class="MsoPlainText">> *Subject:* Re: [Year 12 SofDev] DFD question</p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> I had the same issue with the DFD and UCD for one of the programming
</p>
<p class="MsoPlainText">> outcomes.</p>
<p class="MsoPlainText">> The restaurant customer would be an obvious actor/external entity in a
</p>
<p class="MsoPlainText">> system that takes meal orders.</p>
<p class="MsoPlainText">> However since the waiter is the one interacting with the system, and
</p>
<p class="MsoPlainText">> the customer is interacting with the waiter, the customer does not
</p>
<p class="MsoPlainText">> appear at all in the system representation.</p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> Sometimes what seems logical is not as it first appears.</p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> On 22 February 2013 13:14, Simone Tynan <<a href="mailto:Simone.Tynan@shcy.vic.edu.au"><span style="color:windowtext; text-decoration:none">Simone.Tynan@shcy.vic.edu.au</span></a>>wrote:</p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">>> Hi all,</p>
<p class="MsoPlainText">>> </p>
<p class="MsoPlainText">>> I am having trouble with aspects of a DFD.</p>
<p class="MsoPlainText">>> </p>
<p class="MsoPlainText">>> I have a DFD and context diagram in which shows a customer orders a
</p>
<p class="MsoPlainText">>> service and it is quoted and carried out.</p>
<p class="MsoPlainText">>> </p>
<p class="MsoPlainText">>> Similar scenario, except the service is being carried out for a
</p>
<p class="MsoPlainText">>> beneficiary. (Think Ninja and assassins. ;-) )</p>
<p class="MsoPlainText">>> </p>
<p class="MsoPlainText">>> The Customer is providing all details and payments. The beneficiary
</p>
<p class="MsoPlainText">>> is not actually adding to or receiving from the system (that I can see).</p>
<p class="MsoPlainText">>> </p>
<p class="MsoPlainText">>> Are they still added as an external entity? Is there any connection
</p>
<p class="MsoPlainText">>> between them and the system?</p>
<p class="MsoPlainText">>> </p>
<p class="MsoPlainText">>> Many thanks for any input/</p>
<p class="MsoPlainText">>> Simone</p>
<p class="MsoPlainText">>> </p>
<p class="MsoPlainText">>> ************************************</p>
<p class="MsoPlainText">>> Simone Tynan</p>
<p class="MsoPlainText">>> eLearning Leader</p>
<p class="MsoPlainText">>> LOTE Leader P-12</p>
<p class="MsoPlainText">>> <a href="mailto:Simone.Tynan@shcy.vic.edu.au"><span style="color:windowtext; text-decoration:none">Simone.Tynan@shcy.vic.edu.au</span></a></p>
<p class="MsoPlainText">>> </p>
<p class="MsoPlainText">>> </p>
<p class="MsoPlainText">>> --</p>
<p class="MsoPlainText">> --</p>
<p class="MsoPlainText">> Mark Kelly</p>
<p class="MsoPlainText">> mark AT vceit DOT com</p>
<p class="MsoPlainText">> <a href="http://vceit.com"><span style="color:windowtext; text-decoration:none">http://vceit.com</span></a></p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> *St. Brigid's College *</p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> 97 Robinson Street, Horsham VIC 3400</p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> T 03 5382 3545 F 03 5382 0757</p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> ABN 72 749 438 155</p>
<p class="MsoPlainText">> </p>
<p class="MsoPlainText">> <a href="http://www.stbc.vic.edu.au"><span style="color:windowtext; text-decoration:none">www.stbc.vic.edu.au</span></a></p>
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<p class="MsoPlainText">Mark Kelly</p>
<p class="MsoPlainText">mark AT vceit DOT com</p>
<p class="MsoPlainText"><a href="http://vceit.com"><span style="color:windowtext; text-decoration:none">http://vceit.com</span></a></p>
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<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Message: 3</p>
<p class="MsoPlainText">Date: Mon, 25 Feb 2013 10:30:44 +1100</p>
<p class="MsoPlainText">From: "Selina Dennis" <<a href="mailto:selina@dennis.net.au"><span style="color:windowtext; text-decoration:none">selina@dennis.net.au</span></a>></p>
<p class="MsoPlainText">Subject: Re: [Year 12 SofDev] DFD question</p>
<p class="MsoPlainText">To: "'Year 12 Software Development Teachers' Mailing List'"</p>
<p class="MsoPlainText"> <<a href="mailto:sofdev@edulists.com.au"><span style="color:windowtext; text-decoration:none">sofdev@edulists.com.au</span></a>></p>
<p class="MsoPlainText">Message-ID: <<a href="mailto:002d01ce12e6$f902a040$eb07e0c0$@dennis.net.au"><span style="color:windowtext; text-decoration:none">002d01ce12e6$f902a040$eb07e0c0$@dennis.net.au</span></a>></p>
<p class="MsoPlainText">Content-Type: text/plain; charset="us-ascii"</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Hi Mark,</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">I'd disagree with your argument in regards to the Customer not playing a role in interacting with the system. To me, the waiter is simply the input method - much like a keyboard - and the information is coming from the customer. So in
a DFD/UCD scenario, I wouldn't include the waiter in the process of ordering food - that would come from the customer. However, if the waiter had some other interaction with the system, such as collecting tips at the end of the day, then they would become
more than simply the input method, and thus would be shown.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Hope that makes sense! Just my take on it.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Selina Dennis</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Strathmore Secondary College</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">From: <a href="mailto:sofdev-bounces@edulists.com.au"><span style="color:windowtext; text-decoration:none">sofdev-bounces@edulists.com.au</span></a> [<a href="mailto:sofdev-bounces@edulists.com.au"><span style="color:windowtext; text-decoration:none">mailto:sofdev-bounces@edulists.com.au</span></a>]</p>
<p class="MsoPlainText">On Behalf Of Mark</p>
<p class="MsoPlainText">Sent: Monday, 25 February 2013 10:06 AM</p>
<p class="MsoPlainText">To: Year 12 Software Development Teachers' Mailing List</p>
<p class="MsoPlainText">Subject: Re: [Year 12 SofDev] DFD question</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Hi all. It's an interesting situation. This is my take on it.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">We all probably start by seeing it from a human point of view: the customer is dealing with the waiter, who deals with the system. So the customer is an integral part of the transaction and therefore appear in a DFD or UCD...</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">But the waiter is not a part of the system: he/she interacts with it as an external entity (EE).</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">So where does the customer fit in? An EE to the EE waiter? An EE once removed? We don't do that in DFD or UCD.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">>From the system's point of view, the waiter is an EE. The customer is a</p>
<p class="MsoPlainText">fictional character that the system does not see, hear, or believe in. Only the waiter exists to the system. Everyone else is Santa Claus.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">We could complicate it further and imagine that a child is giving her meal choice to her mother who gives it to the waiter... should the child be in the DFD/UCD now as an EE twice removed?</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">If a waiter were ordering his own lunch from the kitchen, would he be represented again in the diagram - this time as a customerless EE?</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">As I read it, the customer is not directly interacting with the system; the waiter is. So the waiter appears as an EE.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">So I would not include the customer at all in a DFD or UCD.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Anyone out there who did DFD/UCD at uni?</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Cheers</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Mark</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">On 25 February 2013 08:57, Kent Beveridge <<a href="mailto:kbeveridge@stbc.vic.edu.au"><span style="color:windowtext; text-decoration:none">kbeveridge@stbc.vic.edu.au</span></a>></p>
<p class="MsoPlainText">wrote:</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Data flow to my understanding here..</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Waiter to Customer ....Request for order</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Customer to Waiter ....Food/Beverage order</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Waiter and Customer both 'entities' send data back to the central part of the 'system' (restuarant system) via the waiter</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Yep actors are waiter and customer.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">I havent started UCD stuff with my guys just yet..focussing on DFD's ...ucd next.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Kent Beveridge</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">ICT Coordinator & Maths Teacher</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"><a href="mailto:kbeveridge@stbc.vic.edu.au"><span style="color:windowtext; text-decoration:none">kbeveridge@stbc.vic.edu.au</span></a></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"> _____ </p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">From: <a href="mailto:sofdev-bounces@edulists.com.au"><span style="color:windowtext; text-decoration:none">sofdev-bounces@edulists.com.au</span></a> [sofdev-bounces@edulists.com.au] on behalf of Mark [mark@vceit.com]</p>
<p class="MsoPlainText">Sent: Saturday, 23 February 2013 7:15 AM</p>
<p class="MsoPlainText">To: Year 12 Software Development Teachers' Mailing List</p>
<p class="MsoPlainText">Subject: Re: [Year 12 SofDev] DFD question</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">I had the same issue with the DFD and UCD for one of the programming outcomes.
</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">The restaurant customer would be an obvious actor/external entity in a system that takes meal orders.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">However since the waiter is the one interacting with the system, and the customer is interacting with the waiter, the customer does not appear at all in the system representation.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Sometimes what seems logical is not as it first appears.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">On 22 February 2013 13:14, Simone Tynan <<a href="mailto:Simone.Tynan@shcy.vic.edu.au"><span style="color:windowtext; text-decoration:none">Simone.Tynan@shcy.vic.edu.au</span></a>></p>
<p class="MsoPlainText">wrote:</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Hi all, </p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">I am having trouble with aspects of a DFD.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">I have a DFD and context diagram in which shows a customer orders a service and it is quoted and carried out.</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Similar scenario, except the service is being carried out for a beneficiary.</p>
<p class="MsoPlainText">(Think Ninja and assassins. ;-) )</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">The Customer is providing all details and payments. The beneficiary is not actually adding to or receiving from the system (that I can see).</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Are they still added as an external entity? Is there any connection between them and the system?</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Many thanks for any input/</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Simone</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">************************************</p>
<p class="MsoPlainText">Simone Tynan</p>
<p class="MsoPlainText">eLearning Leader</p>
<p class="MsoPlainText">LOTE Leader P-12</p>
<p class="MsoPlainText"><a href="mailto:Simone.Tynan@shcy.vic.edu.au"><span style="color:windowtext; text-decoration:none">Simone.Tynan@shcy.vic.edu.au</span></a></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"> </p>
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<p class="MsoPlainText"> </p>
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<p class="MsoPlainText"> </p>
<p class="MsoPlainText">Mark Kelly</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText">mark AT vceit DOT com</p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"><a href="http://vceit.com"><span style="color:windowtext; text-decoration:none">http://vceit.com</span></a></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"></p>
<p class="MsoPlainText"> </p>
<p class="MsoPlainText"> </p>
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<p class="MsoPlainText">mark AT vceit DOT com</p>
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