Three-point estimation: Difference between revisions

Revision as of 14:45, 17 December 2009

Revision as of 14:59, 17 December 2009

Line 10:

: ''E'' = (''a'' + 4''m'' + ''b'') / 6

: SD = (''b'' − ''a'')/3 (in many Sources wrongly /6!)

''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.