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A Study on Quantification of Kano`s Quality Model
(Kentaro Yasuda),(Atsushi Ootaki),(Yasutaka Kainuma) 한국품질경영학회 2001 The Asian Journal on Quality Vol.2 No.2
This paper proposes a method for quantifying the types of quality elements proposed by Kano; namely: attractive quality, one-dimensional quality, and must-be quality. Kano`s classification of required quality has helped us improve our thinking in product development. However, his classification is conceptual rather than quantitative, and the conventional techniques of questionnaire and group interview cannot provide quantification of the relationship between the degree of customer satisfaction and the degree of sufficiency of required qualities. This paper describes how a quality element under Kano`s quality model can be expressed as a utility function, and describes an application to quality design of a cellular phone.
( Daisuke Takamura ),( Kentaro Iwata ),( Tatsuya Sueyoshi ),( Tadashi Yasuda ),( Hideki Moriyama ) 대한슬관절학회 2021 대한슬관절학회지 Vol.33 No.-
Background: Physical activity is associated with physical function; however, the relationship between early physical activity after total knee arthroplasty (TKA) and postoperative physical function remains unclear. The purpose of this study was to evaluate the association of early physical activity after TKA with postoperative physical function. Methods: Timed Up and Go test (TUG) of 47 patients was assessed preoperatively and at 10 days, 3 months, and 6 months postoperatively. Physical activity from the second to the ninth day after TKA was measured with accelerometer, and the correlation with pre- and postoperative physical function was evaluated . A multiple linear regression was used to predict TUG at 6 months after TKA. Results: Postoperative physical activity correlated with preoperative TUG (ρ = -0.485, p < 0.001), TUG at 10 days (ρ = -0.675, p < 0.001), 3 months (ρ = -0.441, p < 0.01), and 6 months (ρ = -0.368, p < 0.05) after surgery. Multiple linear regression indicated that only the preoperative TUG was associated with TUG at 6 months. Postoperative physical activity was not an independent factor predicting TUG at 6 months after TKA. Conclusion: Our study demonstrated that patients with better physical function have higher physical activity in the early postoperative period, whereas it does not affect physical function at 6 months after TKA. In the early postoperative period, increasing physical activity may not always be necessary to improve postoperative physical function. We also confirmed that preoperative physical function affects postoperative physical function. These findings may be beneficial in improving rehabilitation programs in the early postoperative period.