A repeatable patient-specific measurement technique. The process employs common anatomical reference points to guide the individual performing the measurements. The measurements taken are logged into a database using a standard format. A volume corresponding to the area measured is then calculated. The series of measurements can be accurately repeated during subsequent evaluations of the individual. Subsequent volume calculations are also made so that the volume of the measured region can be tracked over time. The volumetric information is then used to evaluate certain individual-specific criteria such as efficacy of weight management plan. Computer software will also present the data in a variety of numerical and graphical formats that are useful to the individual.