Three-point estimation: Difference between revisions

Revision as of 06:58, 28 April 2009

Revision as of 20:27, 28 April 2009

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{{Cleanup|date=March 2009}}

The '''three-point estimation''' technique is based on statistical methods, and in particular, the [[normal distribution]]. Three-point estimation is the preferred estimation technique for [[Informationinformation Systemssystems]] (IS) projects. In the three-point estimation there are three figures produced for every estimate:

* ''a'' = the best-case estimate

* ''m'' = the most likely estimate

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To produce a project estimate the project manager:

* Decomposes the project into a list of estimable tasks, i.e. a [[Workwork breakdown structure]]

* Estimates each the E value and SD for each task.

* Calculates the E value for the total project work as E (Project Work) = Σ E (Task)