An Evaluation Method of Complexity and Difficulty of Difficult-to-Machine Portions for CAPP Based on Flair

No matter how contents described in a given part drawing may fairly complex, the experienced process engneer generally judges, for instance, the difficult-to-machine portion, and also produce the process plan in short time. This is supposed to show something relationship between the difficulty of process planning and the machine portions in the drawing. This paper describes the directed graph representation for the engineer's decision making process and its analysis, and the application of the difficulty of machine portions to the judgement function for the difficulty of process planning, which is a subsystem in CAPP based on the flair.