Revision as of 10:28, 1 September 2009 edit Atomice (talk \| contribs) 100 edits →Project management: IS -> Information Systems ← Previous edit		Revision as of 14:10, 17 December 2009 edit undo 194.48.126.192 (talk) →Project management Next edit →
Line 29: * Confidence level in E value is approximately 50% * Confidence level in E value + SD is approximately 7085% * Confidence level in E value + 21.645 × SD is approximately 95% * Confidence level in E value + 32 × SD is approximately ~~99.5~~98% * Confidence level in E value + 3 × SD is approximately 99.9% * Information Systems uses the 95% confidence level, i.e. E Value + 21.645 × SD, for all project and task estimates. These confidence level estimates assume that the data from all of the tasks combine to be approximately normal (see [[Asymptotic distribution#Asymptotic normality\|asymptotic normality]]). Typically, there would need to be 20–30 tasks for this to be reasonable, and each of the estimates E for the individual tasks would have to be unbiased.

Three-point estimation: Difference between revisions