Using a functional approach to technological innovation systems (TIS) combined with a multilevel framework of technological change, the report describes and analyses the development of hybridelectric vehicle technology in Sweden 1990-2010. The multilevel framework captures the interplay between the focal innovation system (i.e. the Swedish hybrid-electric vehicle TIS), dynamisms in the global automotive industry and public environmental debates. This description provides a basis for analysing the functionality of a number of essential sub-processes in the technological innovation system, including: knowledge development and diffusion, influence on direction of search, entrepreneurial experimentation, market formation, legitimation and resource mobilisation. The report further discusses how various governance arrangements have influenced these subprocesses during the studied time period.