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Line 14: ''E'' is a [[weighted average]] which takes into account both the most optimistic and most pessimistic estimates provided. SD measures the variability or uncertainty in the estimate. In Project Evaluation and Review Techniques ([[PERT]]) the three values are used to fit ~~an asshole~~a [[Beta distribution]] for [[Monte Carlo Method\|Monte Carlo]] simulations.{{Citation needed\|date=September 2010}} The [[triangular distribution]] is also commonly used. It differs from the double-triangular by its simple triangular shape and the mode does not have to coincide with the median. The mean (expectation) is then:

Three-point estimation: Difference between revisions