[Year 12 IT Apps] Question on critical path

Tue Oct 13 19:03:41 EST 2009

At revision today I talked about the chap who cuts the grass with a junior
apprentice. The boss rides the lawn mower (50 min) whilst the apprentice
does the edging (30 min) and sweeps the path (10 min). There is only one
mower, edger and broom. The broom can only be used after the lawn is cut and
edging is done. The group had a good laugh when the remaining few finally
understood that the apprentice was on the critical path (pun not intended).

I am enjoying going over the past exams. Students are now in awe at the work
that is put in to assemble these when I walked them through an examiners
report. My mind keeps turning to all the delicious discussions we have post
examination time for particular questions. I wonder if any other subject
deconstructs there assessment tasks with such energy and enthusiasm?

Off to see District 9 tonight .. need incentive to finish marking the last
outcome.

Regards Roland

2009/10/12 McDonald, Debra A1 <mcdonald.debra.a1 at edumail.vic.gov.au>

> ok now you all have me confused... the original question is critical path
> the "longest time taken" or the "shortest time taken" and now we are on all
> different directions still about the same thing but all bouncing around the
> original question...
>
> I said to my class that the potts book is correct.
> If that is not what the examiners are going to look for, can some one help
> me and tell me what the answer is???? my kids need to be told the truth...
>
> thanks
>
>  Debra McDonald
> Network Manager
> Lyndhurst Secondary College
> Cranbourne
> (03) 5996 0144
> mcdonald.debra.a1 at edumail.vic.gov.au <mailto:
> mcdonald.debra.a1 at edumail.vic.gov.au>
>
> ________________________________
>
> From: itapps-bounces at edulists.com.au on behalf of Kent Beveridge
> Sent: Mon 12/10/09 1:58 PM
> To: Year 12 IT Applications Teachers' Mailing List
> Subject: RE: [Year 12 IT Apps] Question on critical path
>
>
> I agree...yes you can. There may be different tasks(naturally) and
> potentially more than one way to complete the project. There may thus be
> different lead or lag times(slack times) as a result of the divergence to
> one of the (many?) potential paths. If you are being specific, just be aware
> of this when presenting these potential scenarios to your pupils.
>
> Ah, ya gotta luv critical path analysis(ops research to the mathematitians
> among us!).
>
> Kent.
>
> Kent Beveridge, St. Brigids CSC, Horsham. Ph (03) 5382 3545
> http://www.stbc.vic.edu.au/ email: kbeveridge at stbc.vic.edu.au "This email
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> ________________________________
>
> From: itapps-bounces at edulists.com.au on behalf of Roland Gesthuizen
> Sent: Mon 10/12/2009 1:03 PM
> To: Year 12 IT Applications Teachers' Mailing List
> Subject: Re: [Year 12 IT Apps] Question on critical path
>
>
> Just curious .. can you have two critical paths of exactly the same length
> (or I am just playing about with words and splitting hairs)?
>
>
> 2009/10/12 Mark Kelly <kel at mckinnonsc.vic.edu.au>
>
>
>        Both are true. The minimum time to complete all tasks is also the
> longest path from start to end.
>
>        Just depends on which way you look at it.
>
>
>        Paul Golub wrote:
>
>
>                Dear All,
>
>                a critical path for a project is the series of activites
> that determine the earliest time by which the project can be completed.
>
>                Emphasis on "earliest time".
>
>                In a trial exam my students did some put that the "critical
> path is the longest path which a project cannot be delayed wthout delaying
> the entire project"
>
>                Emphasis on "longest time". Would this answer be accesptable
> in an exam?
>                Is it "earliest time" or "longest path" or both is ok.
>                Thank you for any replies.
>                Paul Golub
>                Santa Maria College
>                50 Separation Street
>                Northcote 3070
>                Ph: 9488 1674
>
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-- 
Roland Gesthuizen - ICT Coordinator - Westall Secondary College
http://www.westallsc.vic.edu.au

"Never doubt that a small group of thoughtful, committed citizens can change
the world; indeed it is the only thing that ever has." --Margaret Mead
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