An activity on a PERT network has these time estimates: optimistic = 2, most likely = 5, and pessimistic = 10. Its expected time is
A) 5.00
B) 5.33
C) 5.67
D) 17.00
E) none of these

Question

Quizplus · Accepted Answer

The expected time of an activity on a PERT network is calculated using the following formula: 
Expected Time = (optimistic + 4 × most likely + pessimistic) ÷ 6

Plugging in the time estimates given: 
Expected Time = (2 + 4 × 5 + 10) ÷ 6 = 5.33

Therefore, the best choice is B.

An Activity on a PERT Network Has These Time Estimates