The methods and problems encountered in the development of a prototype human resources data handbook are discussed. The goal of the research was to determine whether it was feasible to consolidate, in a single comprehensive handbook, human resources data applicable to system design and development. Selected for this purpose were data on the functions performed by the 32XXX avionics career field on the fire control system of nine Air Force fighter systems. The report discusses the methods used and the problems encountered during the development of the prototype handbook. The prototype handbook, presented in Appendix A, was designed for ease of use and was organized into three major data sections. Section 1 was reserved for data comparisons on system design, training, manpower, occupational tasks, maintenance procedures, etc. Included in Section 2 were data on past, current, and projected numbers of personnel, various skill levels, etc. Section 3 was reserved for technical information that could be generalized to a wide variety of problems. Included in the last section were data on the effects of task difficulty, error rates in performing maintenance activities, performance time, and experience level. An alphabetical index of contents concludes the handbook. (Author)