关键词: 功能, Affordance概念, 工程设计, 功能结构图, 设计理论, 设计方法学

Abstract: Based on ‘function’ in intention realm but mixed the consideration from physical realm,the current function structure method was complexity-coupled and hard applied.To solve this problem,Affordance concept of real domain and function concept were taken as a common basis to decompose the function structure method.One was the reverse function structure from the function view,which started from the consideration what the people want to do;another was Affordance function structure from the affordance view,which started from the consideration what the environment allow to occur.Thus the decoupling of complexity was accomplished,and a reformed function structure method was obtained.The thinking confusion in the drawing process was eliminated with proposed method,and the practicability was also improved.

Key words: function, Affordance concept, engineering design, function structure, design theory, design methodology