Scope Forecasting Calculator
Juicy Satsuma helps you predict the future
We use Folded Normal distribution to predict how long a task will take, based on three predictoins and the level of confidence you're happy run with (50% for the mathematical expectation). It's a better predictor than Normal or Triangular, because they each assume that some tasks get completed in negative time! It's not perfect, but it's pretty damn good from 50% upwards.