Abstract
Quality Function Deployment (QFD) is a quality management tool that transmits customer requirements into product design or innovation process to improve products’ customer satisfaction. For the first time, this paper points out the distortions of customer requirements existing in the transmission process of QFD that are caused by the methods for calculating the importance degree of output information. The distortions lead to the designed or innovated product meeting less important customer requirements, without meeting more important customer requirements, so products’ customer satisfactions are decreased. In order to avoid the distortions, a new method for calculating the importance degree of output information is proposed and an example is illustrated to demonstrate the effectiveness and superiority of the new method.
Highlights
QFD (Quality Function Deployment) is an effective product design method which is put forward in Japan in 1960s
The results show that the importance degrees of TC1 and TC7 are the first and second, respectively, and both TC1 and TC7 are strongly related to the most important customer requirements
Taking the calculating method of the importance degrees of technical characteristics in the first phase of QFD as an example, it is pointed out that distortions exist in customer requirement transmission process due to the defects of QFD output information importance degree calculation methods
Summary
QFD (Quality Function Deployment) is an effective product design method which is put forward in Japan in 1960s. The method for calculating the importance degree of QFD output information determines the reliability of customer requirement transmission process. In the first phase of QFD, customer requirements are converted to product technical characteristics, outputting the importance degrees of the technical characteristics. Using the traditional method for calculating the importance degree of QFD output information, it inevitably appears that, in the first phase of QFD, the importance degree of the Mathematical Problems in Engineering technical characteristic strongly related to more important customer requirement is lower, but it plays more important role for improving product’s customer satisfaction; the distortion in the customer requirement transmission process appears. This paper puts forward a new method, which avoids the distortions of the output information in the customer requirements transmission process and ensures the effect of the implementation of QFD.
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