本文运用系统分析、模糊集理论和灰色关联分析，将设计方案的评选、产品性能的评估等问题，归纳成方案排序问题，并划分为模糊评估和灰色关联分析两个过程，建立了方案排序的多工况模糊加权关联度模型．实例应用表明该方法是可行的．

Based on the system analysis, fuzzy set and grey system realtional degree analysis,a model for ranking the fuzzy and grey degree of correlation for the schemes is developed. This model imitates the way of assessment of a human being on the ranking of the schemes with the fuzziness taken into account.An overall analysis for the schemes are made by means of a grey correlational analysis.The practical examples show that the method is feasible.