 Because open building rejects functionalism, educators who teach open building help students develop skills in making built form, at various levels of intervention that can accommodate changing function.Open building implementation also implies new business models for the delivery of fit-out as integrated design-build packages, serving the consumer market.These companies, now operating in Finland, the Netherlands and Japan, operate with advanced IT support, advanced logistics, and showrooms with electronic and physical samples of products, and with trained installers.