One of the most important problems in product design using quality function
deployment is how to capture true customer requirements. In this research,
we develop systematic methods, processes, and techniques for eliciting com
plete, consistent, nonredundant, and true customer requirements from multip
le perspectives. It covers from requirements acquisition, requirements extr
action to requirements synthesis both within and across perspectives. In ou
r framework, acquisition of requirements starts with identification of key
quality concerns from individual perspectives. It is followed by elicitatio
n, analysis, and extraction of both functional and nonfunctional requiremen
ts using various techniques, such as structured interviews, functional deco
mposition, quality attribute analysis, and use case analysis. The derived r
equirements are synthesized into required quality requirements using generi
c rules. In the synthesis, we must make sure to detect and resolve mutual e
xclusive requirements, remove ambiguity in requirements, and delete duplica
te ones.