The statistical analysis of designs is not common in architectural circles (though it does occur on very large projects), but it is quite common in interface and document design. The Information and Graphic Design Tutorial describes user analysis in general and gives you pointers to more advanced texts if you are interested in the topic.
About Design Theory
Planned Link: User Centred Design
Fletcher, M., Information and Graphic Design Tutorial, University of Waterloo, 1995.
Auxiliary Elements for document tb.function.engineer.user.htm
Part of Toolboxes and Treasure-chests.