Tien Nguyen

Requirements models are essential not just during sys-tem implementation, but also to manage system changes post-implementation. Such models should be supported by a requirements model management framework that allows users to create, manage and evolve models of domains, requirements, code and other design-time ar-tifacts along with traceability links between their ele-ments. We propose a comprehensive framework which delineates the operations and elements necessary, and then describe a tool implementation which supports ver-sioning goal models. 1