A technique for computing a relative change index (RCI) from intake and follow-up scores for a number of different outcome measures is described. The computed index value ranges from -100 to +100, indicating an individual''s position on a spectrum of maximum possible improvement or deterioration (for each measured category). The index is constructed to consider each alcoholic''s specific level of debilitation at the onset of treatment, and the total improvement possible for that particular person (or group). The categories measured for sample demonstrations of the use of the RCI were drinking quantity, drinking frequency, drinking pattern, degree of physical impairment and behavioral impairment. The technique apparently offers a realistic way to describe changes in the patients and, since it is standardized to a simple scale, the results can be presented in a nontechnical manner. The applicability of the index to other human service areas is also suggested.