A Decision-Making Method for New Energy Vehicle Product Renewal Program Based on Portfolio Assignment—TOPSIS-GRA

为了实现新能源汽车产品更新方案的评价与决策，依据评价指标体系的构建原则，构建了新能源汽车产品更新方案评价指标体系。同时，基于组合专家打分法、熵权法、TOPSIS法和GRA法提出组合赋权——TOPSIS-GRA的新能源汽车产品更新方案决策方法。采用专家打分法进行主观权重计算，熵权法进行客观权重计算，并进行非线性乘法结合完成最终权重分配，将TOPSIS法中的正理想解作为目标序列引入GRA法，将更新方案的多项指标综合成单一指标，从而实现更新方案的排序和优选。最后，针对过程中决策者偏好问题和评价指标权重问题进行敏感性分析，验证了方法的稳定性和可靠性。In order to realize the evaluation and decision-making of new energy vehicle product renewal program, based on the construction principle of evaluation index system, the evaluation index system of new energy vehicle product renewal program is constructed. Meanwhile, the decision-making method of new energy automobile product renewal program of combination empowerment—TOPSIS-GRA is proposed based on combination expert scoring method, entropy weight method, TOPSIS method and GRA method. The expert scoring method is used for subjective weight calculation, the entropy weight method is used for objective weight calculation, and the nonlinear multiplication method is combined to complete the final weight allocation, and the positive ideal solution in the TOPSIS method is introduced into the GRA method as the target sequence, so as to synthesize the multiple indexes of the updating scheme into a single one, thus realizing the sorting and preference of the updating scheme. Finally, a sensitivity analysis is carried out for the problem of decision-maker preference and the problem of evaluation index weights in the process to verify the stability and reliability of the method.