Example calculate PERT estimate for the expacted duration of the work package

Example calculate PERT estimate

Example calculate PERT estimate Your lead engineer estimates that a work package will most likely require 50 weeks to complete. It could be completed in 40 weeks if all goes well, but it could take 180 weeks in the worst case. What is the PERT estimate for the expected duration of the work package?   a. 45 weeks  b. 70 weeks  c. 90 weeks  d. 140 weeks  Answer: b. 70 weeks  PERT estimate E(t) = (Optimistic+(4xMostlikely)+Pessimistiic ) / 6  = (40 + 200 + 180) / 6  = 420/6 = 70 weeks  [Planning]

Your lead engineer estimates that a work package will most likely require 50 weeks to complete. It could be completed in 40 weeks if all goes well, but it could take 180 weeks in the worst case. What is the PERT estimate for the expected duration of the work package? 

a. 45 weeks 
b. 70 weeks 
c. 90 weeks 
d. 140 weeks

Answer: b. 70 weeks 

PERT estimate

E(t) = (Optimistic+(4xMostlikely)+Pessimistiic ) / 6 
= (40 + 200 + 180) / 6 
= 420/6
= 70 weeks 
[Planning]