For example, there may be conflicts between ease of use, and fast response. These conflicts can be explicitly documented and considered during design decisions. Hence, it does not provide the data and process modeling constructs supported by traditional systems analysis and design methodologies. Thus, QFD and the traditional systems analysis methods are complementary in some ways. We therefore propose a framework for integrating QFD into the systems analysis and design process, in order to increase the likelihood of developing high-quality systems.
Customers also specify the relative importance of different features.
For example, high system availability may be a critical requirement. This could be linked to hardware specifications, software features, backup and recovery procedures, availability of support personnel, etc. From the set of final system quality characteristics, critical subsystem characteristics are determined. For example, hardware specifications would be linked to specifications for computers, telecommunication components, etc. For example, detailed steps in installing a telecommunication network and associated software might be specified.