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9: Highest Importance 3: Medium bnpoitance 1: Lowest Importance

Fig. 4-2. Simplified QFD for FlreSat Mission. This limited set of needs and responding technical attributes would be expanded significantly for the complete design process.

9: Highest Importance 3: Medium bnpoitance 1: Lowest Importance

Fig. 4-2. Simplified QFD for FlreSat Mission. This limited set of needs and responding technical attributes would be expanded significantly for the complete design process.

Recalling the discussion on constraints (at the end of Sec. 4.1), we understand that the customer needs that the system cost no more than $20 million per year of operation; that is a constraint and all needs and technical attributes must meet this criterion. Thus, while it is a fixed requirement, we may leave it off the customer needs column of the QFD so as not to overbalance weighted scoring. If it were stated as having a target cost of $20 million or less, we might trade that figure and put it on the left hand side of the matrix. As a next stage use of QFD, the technical attributes developed In the top level would then become the requirements or "what" (left side) of the QFD

matrix, with definitive characteristics, such as specific orbits, coverage per pass or unit time and top reliability level which we would derive to satisfy the set of specified technical requirements. Figure 4-3 illustrates this progression.

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