Many different sources of input are available to assistive technology innovators during the course of designing products. However, there is little information on which ones may be most effective or how they may be efficiently utilized within the design process. The aim of this project was to compare how three types of input--from simulation tools,…

Following a discussion of a number of objective methods of program evaluation, the author recommends a more subjective or existential model. Described briefly are the behavioral objectives model, the goal-free model, the systems analysis model, the decision-making model, the accreditation and adversary models, and the transactional model. The…