Challenges: Late system and integration tests and late failure findings Concept: Representation of multiple ECUs, each in individual (remote accessible) Micro-HiLs enables component testing Dynamic Connecion of Micro-HiLs via software configuration, enables early integration and system testing High utilisation of prototypes/Micro-HiLs (èSustainability) Integration in CI/CT Pipeline This presentation addresses the issue of reducing costs and testing time, and will outline the challenges of the development process and then propose solutions to how to address those challenges.