Modellbasierte Entwicklung automobiler Steuerungssysteme in kleinen und mittelständischen Unternehmen

Small and medium enterprises (SME) are the innovation carriers of the industry and especially for the technology-oriented automotive industry. For a more extensive integration of SME in the software development many obstacles have to be overcome, because of the big structural and cultural differences to large-scale enterprises. In these companies the development is organized by tightly regulated development processes and often long-term decision making processes, which are necessary because of the distributed development by many engineers. In opposite to that is the advantage of SME their big flexibility and the more simple process organisation, which leads to creative solutions, fast decisions and a customer oriented work. The approach in this thesis introduces a development process, which bases on interfaces and methods from large-scale enterprises processes. But the processes itself are simplified, combined and weighted in a different way. The goal is to skip the elements, which were introduced to organize the massive parallel work of engineers, but to keep those elements, which ensure a high software quality. It is shown that especially model-based development is best suited to support this goal. Additionally a development tool was realized, that fits to the new process approach and enables model-based software development. The introduced processes were implemented and evaluated in a small development company. It is shown, that the processes are successfully approved by the assessment method Automotive SPICE. For the development tool requirements were defined and the architecture is presented. The main design element is an abstraction layer, which separates the configuration from the modeling-tool and integrates the parameters for simulations and code generation. For evaluation different case studies are presented. The case studies show and discuss the usage of the tool and methods in developing electronic control units for automotive applications. The interface to different external software tools is evaluated and discussed. In summary the thesis presents an approach, how small and medium enterprises give a beneficial contribution to the development of automotive control-systems, when processes and tools support the individual advantages of these enterprises.