Study on the Design Factors Affecting the Operating Actions that Can Be Used Easily at the Design Stage

Evaluating the assemblability at the design stage is important because of the cost competitiveness of company. However by compared results of the sequence of bottle neck process of production stage, the Lucas DFA (Design for assembly) and Boothroyd & Dewhurst DFA is not enough to evaluate the assenblability accurately. Therefore, in this paper, we proposed three design factors which is affecting assembly but not mentioned at DFA. These design factors would help the designers to evaluate assemblability and improve the productivity.