Abstract: According to the disorder analysis of CNC system, representing the disorder architecture of each subsystem using a disorder tree and constructing the models for whole system and its subsystems by a fuzzy analysis method are presented. The solving algorithms are given. We designed the software by Turbo Prolog language and debugged successfully. The analysis method will be possessed of some reference value to the similar type system or the bigger system such as FMS, CIMS, in solving disorder diagnosis problems.

Key words: CNC Disorder tree, Connected matdrix, Expert system