Use cases have gained wide acceptance since the standardisation of the UML by the Object Management Group in 1997. This paper addresses the inadequacy of use cases for expressing intra-use case and inter-use case dependencies. We present a state-based approach for facilitating explicit consideration of such dependencies in use case descriptions, and a support tool is described, which provides enaction of the state-based use cases to support validation. We outline an industrial study involving the specification of real-time monitoring systems, wherein we demonstrate that enaction of the state-based use cases highlighted important dependency issues that had not been revealed within standard use cases.
- use case
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