QFD - a link between customer requirements and product properties

The method QFD consists of several consecutive phases, in which every phase uses a correlation matrix. To ensure a structured procedure, as well as to illustrate the connection between requirements and properties, this matrix will be expanded to include the House of Quality (HoQ).In this paper the QFD method is used to link and transform customer requirements to product properties of profile structures manufactured by linear flow splitting. The product properties consist of external and internal properties. For this interrelationship of requirements and properties a QFD investigation with two phases is accomplished. In phase one the interrelationship of standardised customer requirements with external properties is investigated. The QFD-Number, a results for the importance of every external property in order to affect and meet certain standardised requirements, is used as weighting factors in the HoQ of the second phase. The second phase QFD links the external properties over internal properties. Internal properties are those that can be adjusted by the designer during a design process. The link from internal to external properties and finally standardised requirements plays an important role during the design process.