The project involved the development and evaluation of a prototype individual performance measurement system. The system was designed to be used on research personnel in a technical consulting firm. Before the system was developed, literature in the field of performance appraisal and the company corporate mission was reviewed. The prototype instrument was then developed based on Behavioral Observation Scales and the Critical Incident Technique. The data necessary to form the prototype was gathered through the use of Nominal Group Technique sessions. The prototype was then evaluated by research personnel in a two month trial appraisal period. Results of this experiment showed that portions of the project were useful to be implemented in the company's current performance appraisal system A description of the prototype system research, development and evaluation is included.