Comments on: Calculating Variance of Activity the PMP way

By: Anonymous

Anonymous — Tue, 03 Jan 2012 04:41:00 +0000

The variance of the activity is still calculated by subtracting the optimistic time from the pessimistic time, dividing the difference by six and then squaring the outcome.

By: Ashok Prasad

Ashok Prasad — Mon, 02 Jan 2012 14:52:00 +0000

If optimistic time
for an activity is 5 days, estimated time to complete the activity 85 and most
likely time 10 days. What is the variance of the activity?

By: Anonymous

Anonymous — Sun, 24 Jul 2011 11:55:00 +0000

Wow, of all the typing errors to go to print, a formula? Ouch! Thank you, Rao, for pointing that out.

By: Bhaskar_rao33

Bhaskar_rao33 — Sun, 24 Jul 2011 08:18:00 +0000

Thanks Derek. The formula has typing error in Rita Mulcahy’s book. Rao

By: Anonymous

Anonymous — Fri, 12 Nov 2010 12:41:00 +0000

Poonam, thank you for adding your recommendation. When people are prepping for the PMP exam, I always recommend they read Rita Mulcahy’s book. To the point of the formula, I do know that it’s a statistical formula. It’s so common, you can find it as a canned formula in Excel. I just come from the approach, when in doubt, put it in the book.