Abstract
This paper describes a system to acquire experienced process engineer's thought model automatically that is necessary for knowledge based computer aided process planning system in job shop type productions. The system is developed for flexibly deciding the condition and facility used in the process according to a difference of production culture. For the system, it is necessary to acquire the thought model based on information processing model of a human brain because culture depends on a human way of thinking strongly. Thought model, however, has been acquired by interview up to now. The proposed system automatically determines thought model in the case of operation planning. A good result is obtained experimentally to show the system is useful to distinguish the thought model of the difference of production culture.