Managing Uncertainties

If you have good historical statistical data that is analogous to a particular in your project, we recommend that you use these data to model uncertainty in your project as opposed to risk events. Be aware of double-counting risk and uncertainty as most of the uncertainty in a project is due to the probability of risk events occurring.

To define uncertainties:
1. Define a 3-point estimate for any of task parameters: cost, income, duration, and start time. 3 points estimates for work will be calculated automatically based on uncertainty in duration. You may also define 3 points estimates for the lag.
2. After you define 3-points estimates, a statistical distribution will be assigned. You may change the default statistical distribution for the duration, cost, income, and start time parameters in Distributions tab of Task Information dialog box.

The meaning of low, base, and high data depends on the statistical distribution defined in the Distributions tab of the Task Information dialog box.

See also

Adding 3-point estimates

Assigning Low and High Estimates for Duration and Cost for Group of Tasks

Defining task distributions