00:01
So for this question, to develop an activity schedule for the project and then calculate the probabilities of completing the project within 25 to 30 weeks, we're going to follow some steps where number one is to calculate the expected time and variance.
00:25
So to calculate the expected time, t, e, it's going to be your optimistic plus four times the most probable plus pessimistic, which is one plus four times three plus five all divided by six, which equals three point three three weeks.
00:56
Your variance is going to be your pessimistic minus your optimistic divided by six squared, which equals zero point four four.
01:09
So repeat this for b and j.
01:18
Number two, calculate es, ls, ef, lf, and slac, where your es is your early start and that would be your max es of preceding events.
01:36
Your ef, which is an early finish, would be es plus te.
01:46
Your ls, which is a late start, would be your minimum ls of succeeding events.
01:56
And then your lf, which is a late finish, would be your ls minus te.
02:02
And then your slac, which is slac for each activity, equals ls minus es.
02:12
And then number three, you want to identify your critical path...