The production of structural components based on fibre-reinforced polymers (FRP) for the building industry is still characterised by a classic downstream development process from design through engineering and down to fabrication. In the aerospace and automotive industry, the current technical developments in simulation and manufacturing processes have reached a highly advanced status. Nevertheless, these manufacturing and Analysis processes are in most cases non-transferable or unsuitable for architectural and structural purposes. The goal of the research presented in this paper is to take advantage of the benefits of FRPs within the architectural domain - focusing on material efficiency, durability and light-weight construction - and to find solutions for the problem of transferability into the building scale. For the construction of a Pavilion built on the campus of the University of Stuttgart in 2012, process-specific tools with a high degree of accuracy embedded from the start were developed for the material analysis, optimisation and fabrication steps. In contrast to product prototyping, which forms the basis of industrial mass production, prototype here refers to the establishment of processes within the context of a post-industrial, customised fabrication paradigm