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Self-adaptive systems (SAS) can reconfigure at run-time to mitigate uncertainties posed by environments for which they may not have been explicitly designed. High-assurance SAS applications must continually deliver acceptable behavior for critical services, enabling the need for run-time validation techniques. To this end, run-time testing can provide additional assurance that an SAS will continue...
It is challenging to design, develop, and validate a dynamically adaptive system (DAS) that satisfies requirements, particularly when requirements can change at run time. Testing at design time can help verify and validate that a DAS satisfies its specified requirements and constraints. While offline tests may demonstrate that a DAS is capable of satisfying its requirements before deployment, a DAS...
Requirements monitoring continuously probes system components and sensors to assess whether the system satisfies its requirements and to detect conditions conducive to a requirement violation. Monitoring, however, is typically computationally expensive, intrusive, and presents tradeoffs between monitoring costs and accuracy, or the degree of coverage and coherence of gathered data. As such, it may...
Self-adaptive systems have the capability to autonomously modify their behavior at run-time in response to changes in their environment. Self-adaptation is particularly necessary for applications that must run continuously, even under adverse conditions and changing requirements; sample domains include automotive systems, telecommunications, and environmental monitoring systems. While a few techniques...
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