Given an activity's optimistic, most likely, and pessimistic time estimates of 4, 12, and 18 days respectively, compute the PERT variance for this activity.
A)2.33
B)5.44
C)8.00
D)64.00

Question

Quizplus · Accepted Answer

PERT variance formula is:

Variance = ((Pessimistic - Optimistic)/6)^2

Substituting the given values:

Variance = ((18-4)/6)^2 = (14/6)^2 = 61.77

Rounding to two decimal places, the variance is 5.44. Therefore, the best choice is B.

Given an Activity's Optimistic, Most Likely, and Pessimistic Time Estimates