The OATT and RAA language related to the measurement and settlement of Performance Assessment Intervals was drafted as part of the Capacity Performance initiative discussed at the Enhanced Liaison Committee meetings in 2014. The first Performance Assessment Interval that resulted in settlement did not occur until October 2, 2019. During the settlement calculation of the individual Performance Assessment Intervals, PJM staff noted a lack of clarity and detail in the governing documents to provide sufficient transparency into the process.