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This study intends to determine market demand for total heat exchangers, and then develop research and development (R&D) strategies to satisfy customers' needs and improve corporate competitiveness. Kano 2-D quality model analysis and questionnaire survey were conducted to identify the importance of customers' expectations of quality constructs, and Kano quality factors of classified quality constructs. The opinion difference of customer attributes for quality construct was then compared. Finally, the results of Kano questionnaires and quality function deployment (QFD) were combined to construct a house of quality, with the voice of customers (VOC) incorporated into the design and planning of total heat exchangers. The results showed that consumers pay attention to convenience of use and the function of improving indoor air quality. The findings can serve as references for manufacturers to identify the qualities of total heat exchangers that attract customers, and design products that satisfy customers’ needs. The results can also serves as references for the development of future energy-saving air conditioning.

This study used Six Sigma DMAIC five-phase improvement procedures for an empirical research on a multinational optical interconnect manufacturer. The Taguchi method was used for the design of experiment, and the data obtained from the orthogonal table were used to determine the key factors and levels, in order to propose the optimal combination of processing parameters and levels for fiber patch cord 3D polishing. The combination of rough polishing time of 30s, polishing pressure of 0.02pa, polishing pad hardness of 65 degrees, and the fine polishing time of 80s could produce the fittest parameters for a satisfactory level, reduce the defect rate and waste of production cost, and reach the Six Sigma standard. The results proved that the improved process capability model, as constructed by this study, can effectively improve the apex offset quality of fiber patch cords. The findings can serve as references for engineers to improve the quality and production process capability.

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