Abstract
To realize incremental product innovation, the key problems of existing products need to be identified and solved with feasible innovation schemes. This study examines the generation process of innovation schemes by integrating Quality Function Deployment (QFD) and the Theory of Inventive Problem Solving (TRIZ). This study has the following advantages: first, this study proposes new rules for distinguishing physical conflicts with technical conflicts and the method for calculating conflict importance after building House of Quality (HoQ) in QFD. Second, an improved integrated model of QFD and TRIZ is constructed, which generates innovation schemes by solving not only the conflicts between technical characteristics but also the problems of product parts. Third, the uncertainty and subjectivity of the data provided by decision-makers in the evaluation process of innovation schemes are processed by interval grey numbers. Moreover, a cone model is built to make the evaluation results more reliable. Last, a case study of water purifiers is conducted to illustrate the validity of the generation process of incremental product innovation schemes.
Highlights
In fierce competition, an innovation which brings competitive power is an essential path to develop enterprises and nations
The literature on the integration model of Quality Function Deployment (QFD) and TRIZ has been extending, some problems still need to be solved for the generation of incremental product innovation schemes
RQ1: How to distinguish the technical conflicts and physical conflicts in the House of Quality (HoQ), calculate their importance, determine the key problems to be solved based on their importance, and generate innovation schemes based on the tools and methods of TRIZ?
Summary
An innovation which brings competitive power is an essential path to develop enterprises and nations. Driven by customers’ requirements, many problems are generally found in our products. Altshuller proposed the eory of Inventive Problem Solving (TRIZ) based on the principles of technological evolution. The literature on the integration model of QFD and TRIZ has been extending, some problems still need to be solved for the generation of incremental product innovation schemes. RQ1: How to distinguish the technical conflicts and physical conflicts in the House of Quality (HoQ), calculate their importance, determine the key problems to be solved based on their importance, and generate innovation schemes based on the tools and methods of TRIZ?.
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