This process can be applied at any system composition level (e.g. It identifies and classifies customer desires (What's), identifies the importance of those desires, identifies engineering characteristics which may be relevant to those desires (How's), correlates the two, allows for verification of those correlations, and then assigns objectives and priorities for the system requirements. The house of quality, a part of QFD, is the basic design tool of quality function deployment. House of quality A house of quality for enterprise product development processes Yoji Akao, the original developer, described QFD as a "method to transform qualitative user demands into quantitative parameters, to deploy the functions forming quality, and to deploy methods for achieving the design quality into subsystems and component parts, and ultimately to specific elements of the manufacturing process." The author combined his work in quality assurance and quality control points with function deployment used in value engineering. Quality function deployment ( QFD) is a method developed in Japan beginning in 1966 to help transform the voice of the customer into engineering characteristics for a product. Early stage product design and development technique
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