The Residential Comparison Index (RCI) has been developed for comparison of displacement and comparable dwellings. As described in Development of Index Numbers, the attributes of each dwelling are assigned numerical values. The higher the index number, the better the quality, size, age and condition of a dwelling. When properly indexed, a dwelling with a higher RCI typically has a higher sale or rent value than comparative dwellings. Determine RCIs for all displacement and comparable residential properties.