Hybrid quality function deployment method for innovative new product design based on the theory of inventive problem solving and Kansei evaluation

This study proposes a new hybrid method that adopts the theory of inventive problem solving and the Kansei evaluation in quality function deployment processes to facilitate innovative new product design and evaluation in the early design phase. The hybrid model and method procedures consist of four stages. First, user satisfaction needs are identified based on a questionnaire of linear numeric rating scale, factor analysis, and an analytic hierarchy process, and the completeness and reliability of this identification are guaranteed by the use of Cronbach’s coefficient alpha statistic. Second, crucial design zones are identified by a correlation matrix, and analyzing the interrelationship matrix at the quality function deployment to establish critical innovation points. Third, the main tools of the theory of inventive problem solving are applied to address these critical innovation points. As such, several innovative alternatives are designed by combining the suitable inventive principles, design rulers, and crucial design zones. Finally, a general and rough set for the Kansei evaluation of the best design alternative is presented. Innovative car seat design is conducted to scientifically and efficiently verify this proposed method.