[Year 12 SofDev] sofdev Digest, Vol 129, Issue 8

Sun Dec 6 09:51:15 AEDT 2015

Thanks for your perspective Robert.

I was thinking more generally, not specifically of a database, so I think I still need further clarification.

See page 15 of the Computing Study Design.

  1.  non-functional, which describes the attributes the solution should possess including useability, reliability, portability, robustness, maintainability

constraints include economic, such as cost and time; technical, such as speed of processing, capacity, availability of equipment, compatibility and security; social, such as level of expertise of users; legal, such as ownership and privacy of data requirements; and useability, such as usefulness and ease of use of solutions

Regards,

[cid:9E5109AF-9726-4BE7-B3EE-B1896EDA6F52]

Katherine Young
11C Mentor
Mathematics & Information Technology Teacher

Castlemaine Secondary College
Etty Street Campus
Etty Street
Castlemaine VIC 3450
T: (03) 5479 4222   |  F: (03) 5479 4230

On Dec 6, 2015, at 9:12 AM, sofdev-request at edulists.com.au<mailto:sofdev-request at edulists.com.au> wrote:

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Today's Topics:

  1. Re: usability - NF requirement or constraint or both???
     (Robert Hind)

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Message: 1
Date: Sun, 6 Dec 2015 09:12:24 +1100
From: "Robert Hind" <robert at yinnar.com>
Subject: Re: [Year 12 SofDev] usability - NF requirement or constraint
or both???
To: "'Year 12 Software Development Teachers' Mailing List'"
<sofdev at edulists.com.au>
Message-ID: <EC796B30E65D4719A4FEFDD20ABD3F18 at RobertPC>
Content-Type: text/plain; charset="us-ascii"

I don't see usabilty itself as an NF requirement. The NF requirement is to
minimise data redundancy. Decreased redundancy then increases the usability
of the database.

Robert Hind
Ex Traralgon and Ashwood
Retired

 _____

From: sofdev-bounces at edulists.com.au [mailto:sofdev-bounces at edulists.com.au]
On Behalf Of Young, Katherine A
Sent: Sunday, 6 December 2015 8:59 AM
To: sofdev at edulists.com.au
Subject: [Year 12 SofDev] usability - NF requirement or constraint or
both???

Hi all,

I've attached a graphic organizer that will hopefully get my kids thinking
more carefully during their analysis of a problem, need or opportunity. Do
others use something similar? I'd love to hear your feedback.

However, in doing so I realized that usability is listed as both a
non-functional requirement AND a constraint. My brain had been thinking that
a social constraint such the users' level of expertise or some other
"audience characteristic" would impose a non-functional requirement in
relation to the usability of a solution.

Could someone please explain the difference between usability as a
constraint and as a NF requirement? I know that I WILL be asked the same
question :-/

Thank you!

Regards,

Katherine Young
11C Mentor
Mathematics & Information Technology Teacher

Castlemaine Secondary College
Etty Street Campus
Etty Street
Castlemaine VIC 3450
T: (03) 5479 4222   |  F: (03) 5479 4230

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