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Today, software systems are moving towards online deployment as collaborative composite services, the operating environments and users' needs for which are continuously changing. Thus, it is important to understand how to cope with run-time requirements by dynamic adaption at different levels. This paper aims to summarize our general position and understanding of this problem. In particular, we introduce...
Requirements engineering (RE) for self-adaptive systems (SAS) is an emerging research area. The key features of such systems are to be aware of the changes in both their operating and external environments, while simultaneously remaining aware of their users' goals and preferences. This is accomplished by evaluating such changes and adapting to a suitable alternative that can satisfy those changes...
Engineering self-adaptive service-based applications significantly challenges the role of requirements engineering (RE). Such systems need to cope with the evolving requirements at runtime by monitoring the changes in users' preferences and in the environment, evaluating the changes and enacting a suitable behavior ensuring an acceptable level of quality for their users. This calls for continuous...
During software development a large amount of varied information is created. It comprises the requirements specification and depending artifacts such as design, code or test cases, as well as supporting information such as traceability links. This information is intended to be used during development time. The research in requirements at runtime has so far focused on using the requirements specification...
The performance of a software system has been a major concern of the information technology services industry since its inception in the early 1960's. Up to now, simulation has been a key technique for gaining an understanding of the performance characteristics of the system during development time, while software tools, possibly together with manual operations, have been used to monitor some performance...
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...
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