A general form-function problem is how the forms of species or other natural forms are so well adapted to how they function. The form-function problem in architecture is defined as the degree to which there is a regular relation between the forms of buildings and the ways in which the parts of society that inhabit them work.
Hillier, B. (1996, 2007), Space is the Machine: A Configurational Theory of Architecture. Space Syntax: London, UK. pp. 114-115