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中文摘要：
研究基于粗糙集的产品规划质量屋中顾客需求改进重要度的确定问题。针对质量功能配置的顾客调查中需求具有不确定和模糊等特征，提出产品规划质量屋中顾客需求确定的粗糙集方法。基于粗糙集中的相对正域方法，确定顾客需求的基本重要度。对顾客需求满意度的改进比率的实现进行效率和风险分析，提出实现顾客需求满意度的改进比率的重要性概念及其计算公式。基于顾客需求的基本重要度、实现顾客需求满意度的改进比率的重要性和“顾客需求的卖点”的融合，提出一种顾客需求改进重要度的确定方法。以全自动洗衣机的产品质量改进为实例，说明所提方法的应用。
英文摘要：
To obtain the importance ratings of the customer requirements＇ improvements for product planning house of quality（PPHOQ）, a method based on rough set theory is proposed. Because the requirements in the customer investigations of PPHOQ are uncertain and fuzzy, based on some related methods of relative reduction and relative core in rough set theory, the customer requirements of PPHOQ are determined. Using the method of relative positive field in rough set, a method of determining the fundamental importance ratings of the customer requirements is proposed. The efficiency and risk analysis are implemented on the achievement of the improvement ratio of customer requirement＇s satisfaction, a formula of calculating the importance rating of achieving the improvement ratio of customer requirement＇s satisfaction is presented. Based on a combination of the fundamental importance rating of customer requirement, the importance rating of achieving the improvement ratio of customer requirement＇s satisfaction and ＂sale point of customer requirement＂, a method of determining the importance rating of the customer requirements＇ improvements is proposed. A case study of product improvement of fully automatic washing machines in a company is provided to illustrate the application of the presented method.
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