A formal requirements specification method based on data flow analysis

Abstract

As formal methods are increasingly used in the development of industrial-scale software systems, there is a growing awareness of the need to integrate formal notations with existing structured software development methods. To make requirements analysis both comprehensible and rigorous, a formal requirements specification method is proposed that combines and extends DeMarco data flow diagrams with the Vienna development method. The specifications produced using this method have good readability, a wellde signed structuring mechanism, and precise semantics. This article details work toward development of a verified analysis approach based on the concept of consistency checking for guaranteeing the correctness of analysis steps. © 1993.