Evaluation of Automobile Design Scheme Based on Improved Grey Situation Decision Method

Evaluation of design scheme for new types of cars refers to multiple attribute comprehensive evaluation. In this paper, an improved grey-situation decision-making method is proposed. The advantage of our method lies in both the preference of decision maker and the objectiveness implicated in the data are incorporated. Firstly, AHP is exploited to build hierarchy and assign subjective weights to each attribute. This can incorporate the decision maker's successful experiences into comprehensive evaluation in a fine-grained way. Secondly, the Grading system is used to enhance the contribution of significant attributes with almost equal value. On the contrary, traditional gray-situation method usually overlooks the contribution of almost equal attributes, even if these attributes are greatly weighted at previous step. Finally, the effectiveness of the method is validated through a real-world automotive design scheme. Our method can be easily generalized and applied to wider domains.