Abstract

Requirements engineering is an important phasein a system’s life cycle. When poorly performed, variousproblems may occur, such as failures, cost overrun anddelays. The increasing complexity of systems makes requirementsengineering activities both more important and moredifficult. Model-driven engineering, in which models are themain artifact during system development, is an emergentapproach that tries to address system complexity by theintense use of models. This article proposes a model-drivenapproach to requirements engineering based on SysMLRequirements and Use Case Diagrams. The main advantagesare that user requirements are graphically modeled, theirrelationships are explicitly mapped, and system decompositionis considered in the early system development activities.In addition, requirements traceability is enhanced by usingthe SysML Requirements tables. The approach is illustratedby a list of user requirements for a road traffic managementsystem.