NCREIF Data Preparation Topics Updating NCREIF Performance Tables with the G/L Update Function Updating NCREIF Performance Tables with G/L Templates Updating the Property Data Performance Table Recalculating Returns Updating Appraisal Data This section describes how to update performance tables with G/L and property data, how to recalculate NCREIF returns, and how to update property appraisal data. Before you generate a file for submission to NCREIF, you must update and prepare your performance data.