Returns the inverse of the beta cumulative probability density function (BETA.DIST). If probability = BETA.DIST(x,.TRUE), ...

Returns the inverse of the beta cumulative probability density function (BETA.DIST). If probability = BETA.DIST(x,...TRUE), then BETA.INV(probability,...) = x. The beta distribution can be used in project planning to model probable completion times given an expected completion time and variability.