This paper discusses the methodology and results of a recent study conducted for the Naval Training Systems Center to develop a generic Prime Item Development Specification for maintenance training simulator (MTS) instructor and student stations (Carroll, et. al, 1986). The approach taken was to develop a classification scheme for MTSs, develop a MTS instructor station/student station attribute taxonomy, conduct a commonality analysis of instructor/student station features among the different types of MTSs, and conduct a survey of MTSs to examine their characteristics and query instructors on their perception of the effectiveness, of instructor station/student station features. The survey results revealed that instructors gave high effectiveness ratings to most of the existing instructor station and student station features. The homogeneity of responses across MTS types indicates that instructor station and student station requirements are a function of the instructional requirements associated with providing maintenance training via a training device, rather than being determined by MTS physical or functional characteristics. The study results were applied to the development of a model specification for MTS instructor station and student station design.