Abstract
The need for better classification systems to under-stand and apply the vast amounts of data about man's performance of jobs and tasks has been expressed by many workers in the behavioral sciences and human factors technologies. Therefore, as a means for more systematically exploring the issues and options with respect to the further development of human performance classification systems, a heuristic modal is presented in this report. With this as a framework, the uses of human performance. The report concludes with some recommendations about what the author believes is required if significant progress is to be made in the further development and utilization of human performance classification systems. (See also B 5012).