Supporting use case based requirements engineering

Use cases that describe possible interactions involving a system and its environment are increasingly being accepted as effective means for functional requirements elicitation and analysis. In the current practice, informal definitions of use cases are used and the analysis process is manual. In this paper, we present an approach supported by a tool for use cases based requirements engineering. Our approach includes use cases formalization, a restricted form of natural language for use cases description, and the derivation of an executable specification as well as a simulation environment from use cases.