Define Probability Distributions for an Activity Duration

Use this procedure to define probability distributions for an activity duration.

To define probability distributions for an activity duration:

  1. Display the Activity Details dialog box for the activity for which you want to define duration probability distributions.
  2. In the Optimistic field of the Risk tab, enter the minimum estimated probable duration for the activity.
  3. In the Pessimistic field, enter the maximum estimated probable duration for the activity.
  4. Review the value in the Original Duration field.
    This field should reflect the most likely duration for the activity.

    For symmetrical distribution shapes, this field is ignored during risk analysis.

  5. If necessary, change the value in the Original Duration field.
  6. In the Shape field, enter a shape for the probability distribution.
  7. If appropriate, select the Key Activity field.

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