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In this paper, we present a technique for incremental and commutative composition of state-machine models of features, using the Feature House framework. The inputs to Feature House are feature state-machines (or state-machine fragments) modelled in a feature-oriented requirement modelling language called FORML and the outputs are two state-machine models: (1) a model of the whole product line with...
Product line (PL) engineering promotes the development of families of related products, where individual products are differentiated by which optional features they include. Modelling and analyzing requirements models of PLs allows for early detection and correction of requirements errors -- including unintended feature interactions, which are a serious problem in feature-rich systems. A key challenge...
While there may be general agreement on what it means for a formal method to be usable (e.g., ease of modelling, automated and scalable analysis), there is no consensus in the software-engineering or formal-methods communities on what strategies lead to more usable formalisms. In this paper, we aim to raise discussion around such strategies by proposing fourteen concrete recommendations for achieving...
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