A method for quantifying performance of a group includes obtaining, for the group, historical group performance data, historical group factor exposure data for a plurality of predefined factors, and historical factor performance data for the plurality of predefined factors. The method includes generating historical group residual performance data for the group in accordance with the historical group performance data, the historical group factor exposure data for the plurality of predefined factors, and the historical factor performance data for the plurality of predefined factors. A respective entry in the historical group residual performance data represents member selection performance associated with the group. The method includes storing the historical group residual performance data for the group; and providing one or more values that represent the historical group residual performance data.