Multifunctionality arises from patterns of land use and building densities, which are themselves influenced by the space-movement relation, that give cities their characteric structures, and give rise to the sense that everything is working together to create the special kinds of well-being and excitement that we associate with cities at their best.
Sources Hillier, B. (1996, 2007), Space is the Machine: A Configurational Theory of Architecture. Space Syntax: London, UK. pp.113-4