The deployment of customer requirements into a product involves numerous decisions at all product hierarchical levels. Some useful concepts in understanding the complexity of decisions in product development are the following: Quality Function Deployment (QFD), teamwork, and designation of static/ dynamic status of parts of the product early in the development process.

QFD is one of the many tools existing for Concurrent Engineering. It is a tool to translate the wishes of the customer into technical demands for the product. Demands for the design, funtional demands and process demands originate in these technical demands. With these demands it is possible to fit the wishes of the customer to the product. As a consequence of this it is possible to manufacture a product that fulfils all the needs of a client. Furthermore QFD makes a comparison between the already existing product and the products of the more important competit

· Analyze causes of nonconformities that involve a large volume of data

Mizuno(1988), says that the affinity diagram method (KJ method)

matrix data-analysis method can be used to

QFD is particularly valuable when design trade-offs are necessary to achieve the best overall solution, e.g. because some requirements conflict with others. QFD also enables a great deal of information to be summarized in the form of one or more charts. These charts capture customer and product data gleaned from many sources, as well as the design parameters chosen for the new product. In this way they provide a solid foundation for further improvement in subsequent design cycles. QFD is sometimes referred to by other 'nicknames' - the voice of the customer (from its use as a way of communicating customer needs), or the House of Quality (from the characteristic house shape of a QFD chart).

· Reinforce and improve the efficiency of the quality evaluation system

Some common words found in the essay are:
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