Three-point estimation: Difference between revisions

Revision as of 13:57, 7 March 2009

Revision as of 16:02, 7 March 2009

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: SD = (''b'' − ''a'')/6

''E'' is a [[weighted average]] which takes into account both the most most optimistic and pessimistic estimates provided and SD measures the variability or uncertainty in the estimate.

To produce a project estimate the project manager:

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* Confidence level in E value + 2 × SD is approximately 95%

* Confidence level in E value + 3 × SD is approximately 99.5%

* IS use the 95% confidence level, i.e. E Value + 2 × SD, for all project and task estimates [''What is "IS"???'']

== See also ==