Abstract
This paper presents a forecasting method for product different size production method, which is for the customers and company has different size requirement on single product design, based on multi-attribute decision making (MADM). Because of the forecast product production factor is complicated, so that first step will filter out the evaluation criteria of wheelset design through practical experiences of focus group, seven professional product designers. After filter out, the evaluation criteria are including maneuverability, manufacturability, style, creativity, and cost. We proposed to use grey number design evaluation to solve forecast product production problem, to set weights for evaluation criteria, and to takes wheelset series of product design for example to verify the method. Grey number design evaluation mainly uses grey numbers to represent the ideas of customers and designers, and then uses Grey relational analysis to find out which factor is most needed by customers and forecast needs extra production among series of product design proposal. The prediction results assisted designer to choose the best alternative from single product proposals and serialized proposals.
