According to the SAFe 6 Scrum Master documentation, one of the metrics that are reported at the Inspect and Adapt event is the ART predictability measure. This metric shows how well the ART delivers on its PI objectives, which are the SMART commitments made by the teams during PI planning. The ART predictability measure is calculated by dividing the total actual business value achieved by the total planned business value, as shown in the PI system demo. The ART predictability measure helps the ART to assess its performance, identify gaps, and improve its forecasting accuracy and reliability.