Glossary » descriptive metric
a value that describes some aspect of a system. For instance, if we were trying to automatically evaluate a web page, we might want to rate its “text legibility” based on a measure of the font size used. An automated tool could identify the modal font size used on the page (a descriptive metric) and report this value. The metric identifies modal font sizes for different websites but makes no specific claim as to what the implications of that value are. This is in contrast to a predictive metric.