A rough set enhanced fuzzy approach to quality function deployment |
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Authors: | Lian-Yin Zhai Li-Pheng Khoo Zhao-Wei Zhong |
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Affiliation: | (1) School of Mechanical and Aerospace Engineering, Nanyang Technological University, Nanyang Avenue, Singapore, 639798, Singapore |
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Abstract: | Quality function deployment (QFD) provides a systematic methodology to assist companies in developing quality products that
are able to satisfy customer needs. The house of quality (HOQ), as the first phase of QFD, plays the most important role in
product development. Frequently, fuzzy numbers are used to quantify the vagueness of linguistic terms so as to facilitate
subjective assessments in the HOQ. However, the issue concerning how to determine the boundary intervals of fuzzy numbers
remains unresolved. This work proposes a novel approach based on rough set theory, and introduces two concepts called rough
number and rough boundary interval to address this issue. A comparative case study presented in this work shows that the proposed
approach has significant advantages compared to the prevailing fuzzy number based method in processing subjective linguistic
assessments in QFD. |
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Keywords: | Quality function deployment (QFD) House of quality (HOQ) Rough sets Product development |
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