Integration of FunKey Approach in SysML

This paper proposes a framework that integrates the previously introduced FunKey approach into a formal system modeling language to enhance early-stage architectural decision-making in systems engineering. FunKey links system functions to key drivers through a coupling matrix, emphasizing structured function allocation to improve system architecting during the conceptual design phase. Up until now, the lack of integration with Model-based systems engineering (MBSE) has limited FunKey's broader application. This paper shows how budget allocation, trade-off analysis, and architecture configuration exploration of FunKey can be implemented into SysML. This resulting framework provides systems engineers with enhanced capabilities for evaluating complex architectures, improving decision-making and alignment with high-level requirements.