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Commercializing Great Products with Design for Six Sigma by David W. Bacon, Randy C. Perry

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Chapter 21. TRIZ

During our QFD discussion, we mentioned that projects often identify conflicts between key technical parameters. Technical conflicts in the design of a new product or process are identified by completing the QFD roof. As shown in Figure 21-1, the roof of the QFD is used to evaluate each product attribute or specification against other attributes/specifications to determine if interactions exist. Considering the QFD roof shown in Figure 21-1, if it is determined that attribute 6 does not change when attribute 1 is increased or decreased, the roof intersection for these attributes is left blank. If, however, attribute 6 increases strongly when attribute 1 increases, a '++' is entered in the column intersection. Similarly, a '+' ...

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