Revision as of 23:03, 3 October 2016 edit Jim1138 (talk \| contribs) Extended confirmed users, Pending changes reviewers, Rollbackers 297,704 edits m Reverted edits by 142.114.160.174 (talk) (HG) (3.1.21) ← Previous edit		Revision as of 06:41, 6 October 2016 edit undo 94.18.216.228 (talk) To clarify the math (that you square the individual standard deviations into variances) - then we can use the rule: the variance of the sum is the sum of the variances Next edit →
Line 26: * Decomposes the project into a list of estimable tasks, i.e. a [[work breakdown structure]] * Estimates the E value and SD for each task. * Calculates the E value for the total project work as :<math>E (Project Work) = Σ\sum{ E (Task)}</math> * Calculates the SD value for the total project work as :<math> SD (Project Work) = ~~√(Σ~~ \sqrt{\sum{SD (Task) ~~<sup>~~^2}}</~~sup~~math>) The E and SD values are then used to convert the project estimates to confidence levels as follows:

Three-point estimation: Difference between revisions