The feasibility of inferring relative task difficulty values and relative task aptitude requirements for a variety of tasks in the General and Administrative work areas is discussed. It was established that there was a high positive relationship between relative task difficulty values, as designated by work supervisors, and the corresponding relative task aptitude requirements, as determined by behavioral scientists. For 3,200 tasks not used in the original scaling procedure, it was determined that relative task difficulty values may be inferred at a high level of confidence, and that relative task aptitude requirements may be inferred at a moderately high level of confidence. (NTIS)