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中文摘要：
针对质量功能配置中顾客需求和工程特性之间的关联关系，以及各项工程特性之间的自相关关系均具有不确定、不分明和模糊等特性，分别提出关联关系和自相关关系确定的粗糙集方法，进而确定工程特性的初始重要度。对工程特性表现的改进比率的实现进行效率和风险分析，提出实现工程特性表现的改进比率的重要性概念及其计算公式。基于工程特性的初始重要度、实现工程特性表现的改进比率的重要性和“技术点”的合成，提出一种工程特性最终重要度的确定方法。以全自动洗衣机的产品研发为实例，说明所提方法的应用。
英文摘要：
Because the functional relationships between customer requirements and engineering characteristics and the correlations among engineering characteristics in quality function deployment are uncertain, unclear and fuzzy, based on some related methods in rough set theory, the methods of determining them are presented, and then the initial importance ratings of engineering characteristics are determined. The efficiency and risk analysis are implemented on the achievement of the improvement ratio of engineering characteristic＇s performance, a formula of calculating the importance rating of achieving the improvement ratio of engineering characteristics performance is presented. Based on a combination of the initial importance rating of engineering characteristic, the importance rating of achieving the improvement ratio of engineering characteristic＇s performance and ＂technical point＂, a method of determining the final importance rating of engineering characteristic is proposed. A case study of product development of fully automatic washing machines in a company is provided to illustrate the application of the presented method.
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