Program Evaluation and Review Technique (PERT) implementation for estimating individual tasks
Best - The shortest possible time needed to complete a task. Average - Duration of task that is 50% probable. Pessimistic - The longest possible duration of the task. Confidence - How confident are you that the real duration will be in the range Best - Worst (only available with 10+ tasks). Confidence - Variance contribution of task, you don't need to pay attention to this row (only available with 10+ tasks).