In the three-point expected-value formula, the optimistic and pessimistic sizes are each weighted once. How many times is the most-likely size weighted?
In the three-point expected-value formula, the optimistic and pessimistic sizes are each weighted once. How many times is the most-likely size weighted?
Answer
four
S = (optimistic + four times most likely + pessimistic) over six. The weighting follows a beta distribution and assumes the true value almost certainly falls inside the optimistic-to-pessimistic range.
Pressman 9e ch25 §25.6