Designing a cross car line worldwide architecture is a real challenge. Making it suitable for the next decade is another one. Upscaling a low cost solution generally ends up with lots of stand-alone electronic modules, whilst downscaling a high end architecture leaves prohibitive “infrastructure costs”. In answer to this paradigm, Tata Motors and Intedis choose an innovative approach starting from functional requirements. This is in contrast to the usual physical component led approach and allows the development of a scalable Electric/Electronic architecture.