How is predictive intelligence confidence calculated?

[AR16]

My classification solution is trying to predict assignment group. I'm creating a flow and the sample flow in docs.servicenow.com suggest using a confidence condition. If confidence is above 50% then use the predicted value.  My question is how this confidence number is determines. 

PI Flow:

https://docs.servicenow.com/en-US/bundle/sandiego-now-intelligence/page/administer/predictive-intell...

[Lener Pacania1]

Confidence in PI is the output probability of the predicted classes (i.e. assignment groups in my example below) from the trained classifier. The class with higher probability (confidence) is the predicted class provided it is greater than or equal to the corresponding threshold value.

[AR16]

Thank you. What's the different between Default confidence and predicted confidence? I'm looking at ml_predictor_results table and seeing different values between Default confidence and predicted confidence. 

[Brian Bakker]

In [ml_predictor_results] table, default confidence is the same as the threshold, and predicted confidence is the same as confidence in the screenshot provided by Lener.