[Year 12 IT Apps] Question on critical path

Wed Oct 14 07:53:08 EST 2009

What a great example..simple and succinct..with a twist!. Might use that one on my lot and we'll have a laugh too. I usually use the boring one of building a house, or bicycle, or car. 
I do use the car as an example of top down(brand new model) or bottom up(next version eg vb,vc etc) design tools.
KB.

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 and any attachments may be confidential. You must not disclose or use the information in this email if you are not the intended recipient. If you have received this email in error, please notify us immediately and delete the email and all copies. The School does not guarantee that this email is virus or error free. The attached files are provided and my only be used on the basis that the user assumes all responsibility for any loss, damage or consequence resulting directly or indirectly from the use of the attached files, whether caused by the negligence of the sender or not. The content and opinions in this email are not necessarily those of the School."

________________________________

From: itapps-bounces at edulists.com.au on behalf of Roland Gesthuizen
Sent: Tue 10/13/2009 8:03 PM
To: Year 12 IT Applications Teachers' Mailing List
Subject: Re: [Year 12 IT Apps] Question on critical path

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 and any attachments may be confidential. You must not disclose or use the information in this email if you are not the intended recipient. If you have received this email in error, please notify us immediately and delete the email and all copies. The School does not guarantee that this email is virus or error free. The attached files are provided and my only be used on the basis that the user assumes all responsibility for any loss, damage or consequence resulting directly or indirectly from the use of the attached files, whether caused by the negligence of the sender or not. The content and opinions in this email are not necessarily those of the School."

	________________________________

	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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