Using Probability Check

DTace Tutorials > Using Probability Check

Probability check is a tool that checks the outcome probabilities of each chance node.  If the sum of probabilities do not add up to 1, you will be notified which node has a problem.

To start probability check, click the Probability Check button on the ribbon.

In the decision tree shown below, node chance 2 has two end nodes emanating from it.  The probabilities are 0.5 for End 4 and 0.4 for End 5.  All chance nodes should have their outcomes equal a probability of 1.

Let's run the probability check.  After clicking the Probability Check button on the ribbon, the following window will appear.

If a node's child probabilities do not sum to 1, edit the child node probabilities to correct the problem.