This article describes a work-in-progress in the framework of a research project aiming at combining requirements engineering methods with formal methods. The main idea is to extend the SysML language with concepts of existing requirements engineering methods. In this article we present extensions to SysML with concepts from the goal model of the KAOS method and we give rules to derive a formal B specification from this goal model. The approach is then illustrated on a case study.
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Abstract. The aim of this paper is to gradually introduce formalism in the requirement engineering phase in order to facilitate its validation. We analyze and elicit our requirements with KAOS, specify them into Event-B language, and then use the animation technique to rigourously validate the derived formal specification and consequently its semi-formal counterpart goal model against original customers' requirements.
Abstract. The transition from the requirements phase to the formal specification phase is one of the most painful steps in software development. Up to now, no well-defined process to build initial formal models has been proposed. We have proposed a method in which initial formal models are built incrementally, driven by a goal-based approach. This paper aims at sharing the salient points of our experience to specify a localization component. We discuss the benefit of using a goal-based modeling to obtain an abstract Event-B specification.
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