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METHOD OF DETERMINING
THE
FINAL IMPORTANCE RATINGS OF
ENGINEERING CHARACTERISTICS
FOR QUALITY FUNCTION
DEPLOYMENT
LI Yanlai1 TANG Jiafu1 YAO Jianming2
PU Yun3
(1. Key Labaratory of Integrated Automation of
Process Industry of MOE, Northeastern
University, Shenyang 110004;
2. School of Economics and Management,
Tsinghua University, Beijing 100084;
3. School of Economics and Management,
Southwest Jiaotong University,
Chengdu 610031
)
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Abstract: 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 characteristic’s 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.
Key words: Quality function deployment
Rough set
Engineering characteristic
Importance rating
CLC No: N94 TP391
国家自然科学基金重点资助项目(70471028, 70625001). Received 20060516, received in revised form 20060919
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