Socially sustainable design With Design is Invisible, LuciusBurckhardt was one of the first to point out that factors that areinvisible can be integrated - they determine the use of objects andshould be part of the design. What is the use of the most attractivetramway if it does not operate at night? Burckhardt expands on themeaning of design, in this case by including the timetable, which canalso be optimized. The relevance of these articles dating frombetween 1965 and 1999 can be appreciated today in the current debate onarchitecture. Problems arising from social polarization, ruraldepopulation, and migration can only be resolved on an interdisciplinarybasis. The articles, for the first time available in English, finallyallow access to key source texts for the purpose of internationaldebate. A new approach to design that takes the invisible parameters into account Tools for architecture and urban design Introduction to an integrative design model.