Christopher Alexander

[Every] design problem begins with an effort to achieve fitness between two entities: the form in question and its context. The form is the solution to the problem: the context defines the problem. In other words, when we speak of design, the real object of discussion s not the form alone, but the ensemble comprising the form and its context. Good fit is a desired property of this ensemble which relates to some particular division of the ensemble into form and context.

— Notes on the Synthesis of Form