ABSTRACT
The Training Within Industry (TWI) scheme assumes that supervisors can be trained to collect adequate data for industrial training by listing in a table the operations in a task and in a separate column commenting on any relevant difficulties which they encounter or anticipate that a novice will have to overcome. Task analysis must recognize not only training problems but problems of equipment design, problems of personnel selection, placement and development and problems of education. Training design, properly considered, raises questions which are not just training questions, questions which are best answered by other disciplines or in consultation with other disciplines such as social psychology. The engineering of the hardware in any system necessarily sets limits on personnel strategies in selection and training. Recognizing that skilled performance can be described at many levels and that the problem is what to record, at what level of description and in what degree of detail, then tasks should be analysed by progressive redescription.
