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When developing software-based control systems, knowledge and experiences in the relevant domain are of great importance. Small- and medium-sized enterprises (SMEs) that are most active here need to capture requirements under severe time and costs pressures. In previous work we have shown that a domain model based on the requirements formalism i* accelerates the requirements capture. Furthermore, the domain model-based similarity search supports the detection of reusable components from earlier projects. But due to the innovativeness, flexibility, and customer-orientation of control systems development, this domain model is subject to continuous change. Within this paper, we investigate the effects of model evolution on our domain model-based requirements engineering approach. Building on examples from industrial practice, we develop a classification of possible domain model modifications. For each such class, we analyze its impact on the similarity search and derive appropriate counter measures to limit these harmful impacts.
Date of Conference: Aug. 31 2009-Sept. 4 2009