A set of criteria is defined to help find errors in, software requirements specifications. Only analysis criteria that examine the behavioral description of the computer are considered. The behavior of the software is described in terms of observable phenomena external to the software. Particular attention is focused on the properties of robustness and lack of ambiguity. The criteria are defined using an abstract state-machine model for generality. Using these criteria, analysis procedures can be defined for particular state-machine modeling languages to provide semantic analysis of real-time process-control software requirements.
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