Requirement evolution: Towards a methodology and framework?

Software systems are undergoing continuing changes and rapid revolution. As consequence, requirements that were satisfied may no longer be satisfied or new requirements may be introduced. Thus, a challenging aspect is to develop a methodology and tools to model, manage, and analyze the evolution of requirements. In this paper, we describe our work at UNITN which targets a framework and methodology for requirement evolution. As an evidence for the feasibility of our approach, we describe our steps to achieve the goal as well as our preliminary result. In which, we propose a foundation to model requirement evolution, and concepts to support reasoning on evolutionary model.