[Year 12 SofDev] sofdev PSM Analysis

Tue Mar 21 12:20:16 AEDT 2017

Hi David

The old SDLC* was a nightmare. Different lifecycle models were used in SD,
IPM** and year 11.
I assume you remember these:

- ADDTDIE (Analysis, Design, Development, Testing, Documentation,
Implementation, Evaluation)
- ADDTIE
- ADDIE

In some models, some steps (e.g. documentation) were either subsumed in
other steps or - like implementation - ignored completely. (I still have a
preference for the ADDTDIE model because it singled out important stages
that are now sidelined.)

It was very stressful walking between VCE IT classes and having to shift
mental gears to get the SDLC steps right for each class. I complained about
this confusing set of models at the time, and was relieved when the PSM
with its ADDE steps arrived.

But I still miss poor old Implementation - the runt of the litter. I quite
enjoyed pilot, phased, direct and parallel.

But - according to VCAA's model - modern software and solutions are
developed and then never documented or rolled out to end-users.  Which is
kind of odd.  I would argue that both documentation and implementation are
far more significant than evaluation.

Mark

For the benefit of young whippersnappers -
* SDLC = System Development Life Cycle.
** IPM (*Information Processing and Management*) was the grandfather of
*Informatics*, and father of ITA (*IT Applications*).

On 21 March 2017 at 09:31, David Dawson <David.Dawson at wesleycollege.net>
wrote:

> I agree with Mark … and assume that the PSM is not a reflection of the
> SDLC. I actually thought (previously) this was a good aspect of this course
> – to use something that was more or less standard terminology across the
> industry. All references to the PSM seems to be related to the VCE IT
> course. Not sure why it was boiled down.
>
> Now I am not sure where I could ANALYSE the requirements of the NEW
> system. I could go on and on with links about this but there is no point
> really, if examiners say that analysis is ONLY about the old system – so be
> it! If the VCAA says cats speak French – well that’s what I will teach!
>
> What advice would you give to a game developer re-analysis?
>
>
>
> *From computerworld.com <http://computerworld.com>*
>
> *Systems analysis, requirements definition:* Refines project goals into
> defined functions and operation of the intended application. Analyzes
> end-user information needs.
>
> *From systemanalysisanddesign.blogspot.com.au
> <http://systemanalysisanddesign.blogspot.com.au>*
>
>
>
> *Analysis of the requirement*: The analyst understands the nature of the
> information and *the functions of the software which is required *for the
> system. The analyst makes a brief survey of the requirements and tries to
> analyze the performance of* the system which is to be developed.* He also
> makes sure that he gets enough information and resources for building the
> appropriate system.
>
>
>
>
>
> [image: logo]
>
>
> * David Dawson* | Head of Learning Technologies, Head of Design and
> Technology
>
> *Wesley College Melbourne*
> Tel: + 61 3 8102 6340 <+61%203%208102%206340> |  Mob: + 61 425 718 147
> <+61%20425%20718%20147>
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> Email: david.dawson at wesleycollege.net
>
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> *Visit our website *www.w <http://www.wesleycollege.net>esleycollege.net
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>
>
>
> *From:* sofdev-bounces at edulists.com.au [mailto:sofdev-bounces at edulist
> s.com.au] *On Behalf Of *Mark
> *Sent:* Monday, 20 March 2017 7:45 PM
> *To:* Year 12 Software Development Teachers' Mailing List
> *Subject:* Re: [Year 12 SofDev] sofdev Digest, Vol 144, Issue 32
>
>
>
> Actually. I was saying the *opposite*: VCE IT *should* follow the natural
> processes of the real world.
>
> Real SRS documents do *not* describe current/old systems, so a *VCE SRS
> should not do it either*.
>
>
>
> Also, people are still assuming that analysis must be of an existing
> system. Why?
> Please - anyone - provide *any *evidence that 'analysis' must be of an
> *existing* system.
>
> I maintain that SRS analysis involves the study of the requirements of the
> system to be developed.
>
> (Are people thinking of *system* analysis as they would *forensic*
> analysis of hairs under a microscope?)
>
>
>
> 'Analysis' refers to the separation of an item into its constituent parts
> for study.
> This is done for a *proposed* system when the entire problem is broken
> down into its parts, and its requirements are thereby identified.
>
>
>
> Also, where is any evidence for the other side of the argument?
> I have provided several examples from exams and the real world that
> indicate that SRS diagrams illustrate the *new* system.
>
> Where is the contrary evidence?
>
> Most of what I am hearing is just assertions and assumptions.
>
>
>
> Anyway, my piggy bank is empty : I have no more cents to spend on this
> topic.
>
>
>
> Mark
>
>
>
>
>
> On 20 March 2017 at 19:24, Andrew Pate <arp at mentonegrammar.net> wrote:
>
> Hi all
>
> Seeing as we are throwing money 💰- here goes.
>
>
>
> Mark is correct about the real world being different from VCE however I
> feel the intention of the study design is clear. The SRS is the culmination
> of the analysis work. It is completed before the design work begins. Seeing
> as I have not begun any design of the new system yet, the SRS must
> therefore contain documentation of the existing system.
>
> Many of the tools could be used as analysis and design tools.
>
>
>
> Andrew Pate
>
> Mentone Grammar
>
> Get Outlook for iOS <https://aka.ms/o0ukef>
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>
>
>
>
> --
>
>
>
> Mark Kelly
>
>
>
> mark at vceit.com
>
> http://vceit.com
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-- 

Mark Kelly

mark at vceit.com
http://vceit.com

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