ATAR Notes: Forum

VCE Stuff => VCE Mathematics => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE General & Further Mathematics => Topic started by: gabardinpo on July 16, 2018, 10:31:27 pm

Title: Networks Critical Path Analysis
Post by: gabardinpo on July 16, 2018, 10:31:27 pm

Not sure how to complete question 3. Thanks in advance!

Title: Re: Networks Critical Path Analysis
Post by: lemonlemonlemon on July 17, 2018, 09:37:18 am

I'm also learning networks (just skimming through haha as I am still doing matrices) so I might be wrong. Right now I don't have the resources to work this out therefore I will tell you the road to its solution and work it out yourself!

So if the earliest which is the "minimum" completion time is path ABCD is 29 (don't know units, could be hours. mins, days...). Then to figure out how long you can delay path J without increasing the earliest completion time is to SIMPLY increase the time of J (by 1 unit, trial and error but if you already filled in the boxes, you can do this in your head easily) to a unit before the minimum completion time (29) increases

Title: Re: Networks Critical Path Analysis
Post by: galaxy21 on July 19, 2018, 05:22:51 pm

So for activity C to begin, J and B must already have been completed. The earliest time in which activity B can be completed is in 15 days (9+6=15), however if this was not to be required, it could begin after 9 days, as this when activity J is completed (5+4=9). This is 6 days earlier (15-9=6), and therefore activity J could be increased by 6 days, meaning that it can be delayed for no more than 10 days (6+4=10).

This is what the answer a teacher told us. Hopefully my explaining isn't too terrible!  :-\