Abstract
Due to the product diversification and complication, sharing the product information between the product development members has been important in the product development process. Quality Function Deployment (QFD) is one of the effective methods that enables the development members to share the information of the product using the quality matrices that describes the relationship between design elements needed to be considered. This paper improves the quality matrices by introducing the multispace design model and the interpretive structural modeling (ISM) method. The multispace design model is a design theory to express the design activity as the inference using the design elements. Based on the concept of the design model, we changed the table items of the quality matrices. The ISM method is one of the design methods to visually express the complex relationship between design elements by using matrix operation. We introduced the ISM method to figure out the relationships between design elements in each deployment chart. The proposed quality matrices are applied to a disc brake design problem, and their applicability is confirmed.
