Knowledge acquisition method for conceptual design based on value engineering and axiomatic design theory

A method for acquiring conceptual design knowledge in physical systems is proposed and implemented based on EBL (explanation-based learning), 'value engineering methodologies' and 'axiomatic design approaches'. In this method, the structural features of designed objects are analysed to yield a systematic explanation of how they function and attain their design goals and why they are used for attaining the goals. The 'how' explanation results in a generalized version of the functional diagram used in value engineering from which various levels of general design knowledge can be extracted. The quality of the extracted knowledge is then discussed with reference to its mode of acquisition. The 'why' explanation yields a deeper understanding of the designed objects from which we can extract meta-planning or strategic knowledge for selecting rational plans from among other possible alternatives. This explanation is obtained by regarding the object in question as being the result of strategically rational decisions and actions which are subject to the 'design axioms'.