Proposal of Quality Function Deployment Based on Multispace Design Model and its Application
Due to the specialization and professionalization of the design work, sharing the product information between the product development members has been important in the product development process. Quality Function Deployment is one of the effective method
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Abstract Due to the specialization and professionalization of the design work, sharing the product information between the product development members has been important in the product development process. Quality Function Deployment 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. The proposed quality matrices are applied to a disc brake design problem, and their applicability is confirmed. Keywords Design methodology
QFD ISM DSM
1 Introduction Functions and mechanisms of products have been diversified and complicated recently. Therefore, design work has been specialized and professionalized [1]. In the situation, the members of the product development should share the product information, including the concept and knowledge. However, the information tends to be left in their mind (i.e. not to be transmitted to others), and this causes quality
T. Kato (&) Department of Mechanical Engineering, Tokai University, Hiratsuka, Japan e-mail: [email protected] Y. Matsuoka Department of Mechanical Engineering, Keio University, Yokohama, Japan e-mail: [email protected]
A. Chakrabarti and R. V. Prakash (eds.), ICoRD’13, Lecture Notes in Mechanical Engineering, DOI: 10.1007/978-81-322-1050-4_5, Ó Springer India 2013
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T. Kato and Y. Matsuoka
issues. Quality Function Deployment (QFD) is one of the effective methods to solve these problems and used in many company throughout the world [2]. QFD is suitable for the members to share the information using the quality matrices as shown in Fig. 1 [3]. Quality matrices are composed by the deployment charts including allied design elements needed to be considered in the design process and the relationship matrices which represent the relationship between design elements in different deployment charts. Using the quality matrices, design elements of customer demands can be translated into that of engineering tasks (engineering characteristics, product’s function, parts and etc.). This enables the product development members (product planners, designers, manufacturing staff and etc.) to share the product’s information and assist to implement the ideal product design free of the quality issues. However, the quality matrices have some problems as follows: 1. Applying to a whole new product development is difficult because they are assumed to be applied to the design for improving existing product [3]; 2. Sharing the product’s information between the development members is counteracted because the quality matrices are different depend on the design process. For example, the relationship matrix between engineering characteristics and parts is only used by the engineering designers or manufacturing staff in the detail design process [4]; 3. The circumstance of the developing prod
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