Revision as of 00:59, 28 May 2009 edit 76.178.158.82 (talk) broke into sections; link to triangular distribution ← Previous edit		Revision as of 10:20, 5 August 2009 edit undo Atomice (talk \| contribs) 100 edits →Project management Next edit →
Line 29: * Confidence level in E value + 2 × SD is approximately 95% * Confidence level in E value + 3 × SD is approximately 99.5% * IS{{huh}} uses the 95% confidence level, i.e. E Value + 2 × 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