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We present a rigorous model-based approach to the stepwise design of contractual state machines, which are a simplified form of state charts extended with declarative specifications. The approach is based on application of a set of refinement patterns, that can be validated against a formal semantics, and that are implemented using update-in-place model transformations. We describe the integrated...
Software engineering endeavours are typically based on and governed by the requirements of the target software; requirements identification is therefore an integral part of software development methodologies. Similarly, engineering a software development methodology (SDM) involves the identification of the requirements of the target methodology. Methodology engineering approaches pay special attention...
The model driven architecture (MDA) is an approach to software engineering in which models are systematically developed and transformed into code. This paper discusses some of the issues which would need to be overcome when attempting to certify a safety critical design or software developed with the MDA approach, partially based on our experience with an avionics software case study. We particularly...
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