Model-Based Requirement Engineering to Support Development of Complex Systems

Abstract

About 90% of the innovations on today’s vehicles are driven by electrics/electronics or software functions. This shifts the focus from a component-oriented perspective to a function-oriented view in engineering. At the same time, descriptions of systems and subsystems are required in order to coordinate collaboration with suppliers. These different views on the system under development essentially affect requirements engineering. On the one hand, information have to be provided, e.g., for requirement specifications for single systems. On the other hand, requirements have to be defined for functions realized on different systems and subsystems. This paper presents a concept for model-based requirement engineering supporting to gather and provide requirements needed for different views within the automotive development process. The concept presented is based on five partial models representing the emerging automotive system from an abstract concept (use cases) to a solution (system structure). Each of the partial models, namely use cases, functions, function realization, system structure and product structure are described with regard to required artifacts and their relations based on object-oriented modeling. These artifacts and relations serve for the allocation of requirements or can be specified by existing requirements. The proposed concept support different views upon the vehicle system and allow to generate structured, consistent documents, like requirements specifications for single systems within the development process. At the same time, the impact of changes concerning single requirements, use cases, functions or systems can be analyzed. The application of the proposed concept is highlighted using the example of an electric vehicle.