Authors: Pai Zheng Xun Xu Sheng Quan Xie
Publish Date: 2016/05/28
Volume: 30, Issue: 1, Pages: 3-16
Abstract
Customer requirements CRs play a significant role in the product development process especially in the early design stage Quality function deployment QFD as a useful tool in customeroriented product development provides a systematic approach towards satisfying CRs Customers are heterogeneous and their requirements are often vague therefore how to determine the relative importance ratings RIRs of CRs and eventually evaluate the final importance ratings is a critical step in the QFD product planning process Aiming to improve the existing approaches by interpreting various CR preferences more objectively and accurately this paper proposes a weighted interval rough number method CRs are rated with interval numbers rather than a crisp number which is more flexible to adapt in real life also the fusion of customer heterogeneity is addressed by assigning different weights to customers based on several factors The consistency of RIRs is maintained by the proposed procedures with design rules A comparative study among fuzzy weighted average method rough number method and the proposed method is conducted at last The result shows that the proposed method is more suitable in determining the RIRs of CRs with vague information
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