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Developing dependable Distributed Real-time and Embedded (DRE) systems incurs significant complexities in the tradeoffs resulting from the different conflicting attributes of dependability, such as predictability, availability, and security. In component-based systems, these challenges are exacerbated since the tradeoffs must faithfully be reflected within the complex metadata descriptors used to compose, deploy and configure the system. The benefits of design-time approaches to address these problems are well-understood. Existing model-driven design-time tools for developing dependable systems, however, focus largely on only one dependability attribute at a time and lack of extensibility results in rigid and hard to maintain tool support.
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