# Green Classify Tool – F Score

For the Green Classify tool, the F-Score provides a harmonic average of Recall and Precision values. The F-Score tends to be the best measure of the overall accuracy of the tool.

To optimize the tool, consider the following:

- To avoid False Positives absolutely, target a Precision score of 100
- To avoid False Negatives absolutely, target a Recall score of 100

Otherwise, target the following:

- For unbalanced problems where sparse classes matter, go by the F-Score.
- Use the F-Score averaged over all classes.
- Set the Threshold Processing parameter to 0% to avoid a varying rate of non-classified views.