Prof. LEUNG Kwong SakWong, Felix W.S.Felix W.S.WongLam W.2023-03-312023-03-311988International Journal of Bio-Medical Computing, 1988, vol, 23 (3-4), pp. 265 - 2780020-7101http://hdl.handle.net/20.500.11861/7723In order to master fuzziness and uncertainty in solving human problems, an expert system shell SYSTEM Z-II which can handle both exact and inexact reasoning has been successfully developed. This paper describes how the Z-II system shell works in building a medical consultation expert system which accepts fuzzy human concepts and uncertain factors. This expert system ABVAB in the domain of "Abnormal Vaginal Bleeding" is described to demonstrate the power and flexibility of such system. The methods of approach in the development and testing of this system are presented together with the results. © 1988.enPeer Reviewed Journal Article10.1016/0020-7101(88)90019-0