An activity on a PERT network has these time estimates: optimistic = 2,most likely = 3,and pessimistic = 8.What is its expected activity time and variance?
A)3.67;1
B)3.67;6
C)4.33;1
D)4.33;6
E)none of the above

Question

Quizplus · Accepted Answer

The expected activity time is calculated using the formula (optimistic + 4*most likely + pessimistic) / 6 = (2 + 4*3 + 8) / 6 = 3.67. The variance is calculated using the formula ((pessimistic - optimistic) / 6)^2 = ((8 - 2) / 6)^2 = 1.

An Activity on a PERT Network Has These Time Estimates