A Toolset for Specifying and Analyzing Requirements

A set of CASE tools is described for developing formal requirements speci cations expressed in the SCR (Software Cost Reduction) tabular notation. The tools include an editor for building the speci cations, a consistency checker for testing the speci cations for consistency with a formal requirements model, a simulator for symbolically executing the speci cations, and a veri er for checking that the speci cations satisfy selected application properties. As background, the SCR method for specifying requirements is reviewed, and a formal requirements model is introduced. Examples are presented to illustrate the tools.

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