Using models to capture requirements and to initialize operations concepts for new product development has received attention in the Eighth Annual INCOSE Symposium in Vancouver, with the result that the requirements handling process itself is more efficient. The document-driven design methodology is replaced with models that state subsystem-level requirements in executable form. However, most "models" are product-focused and do not incorporate a methodology to clarify and quantify customer needs in relation to that product. This paper outlines a method that has been used by the authors in projects varying in size from church building programs to large satellite programs and involves both marketing and system engineering disciplines.
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