A Three-Point Estimating Technique. O 4m p6 where o is the optimistic estimate m the most likely estimate and p the pessmistic estimate. Three Point Estimating And Pert Distribution Cost Time Estimation Project Management Info In this example your standard deviation would be 60-20 6 which works out to be 67 minutes. . Estimation of a task using a. Which is not a point used for three-point estimation. The PMBOK Guide does not use the term PERT. E o 4m p6 where E is three-point Estimate o is the optimistic estimate m the most likely estimate and p the pessimistic estimate When. Also do note that the estimation can. This estimate will be more realistic because youve considered the three estimates in your calculation. Three-point estimating is a management technique to determine the probable outcomes of future events based on available information. This one focuses on the Three Point Estimation Technique. The ...