- arCHitECturE as intErfaCE (^) | 291
 Over time, architectural problems have become increasingly complex,
 driven by economics, technological innovation, and changing societal
 needs for buildings to support new functions and offer innovative fea-
 tures to improve efficiency and safety. Practitioners rely on a body of
 design theory that influences the products of architectural design, and
 highlights the duality of a profession whose aspirations are to create
 artifacts that serve practical needs at the same time that they encode
 meaning for individuals and communities.
 The pervasion of Internet-enabled elements into the physical space of
 everyday life and work forces us to rethink both the requirements of
 our world and the way we design it. Today’s consumers can connect
 a smartphone-enabled door to a system of security; comfort-focused
 devices that transmit video sense and adjust temperature and lighting.
 As interactive environments proliferate and these choices expand in
 the future, designers must expand theory to apply these new modes of
 interaction and meaning to our most pressing objectives.
 ARCHITECTURAL DESIGN THEORY: MODELS
 OF INTERACTION AND MEANING
 Architectural theory analyzes and describes architectural design in
 terms of appropriate elements, their relationships to cultural under-
 standing, and the process of devising them. In this context, theory is an
 explanation that does not proscribe a specific end result. It is a structure
 of concepts, categories, and relationships intended to explain things or
 to advocate, not a defined roadmap or a step-by-step methodology.
 No single comprehensive structure of ideas can be applied in the same
 rigorous way to resolve all design problems in architecture. It is unlikely
 that a formal set of rules lie behind all of the many complex decisions
 that produce an existing building. However, practitioners have long val-
 ued theory in making decisions on complex projects or to retrospec-
 tively clarify a body of work.
 Architectural theory can be traced back to the first century BC. The
 Roman writer and architect Vitruvius^4 wrote a treatise that laid out
 the salient aspects of Roman architecture in a series of volumes. The
 Ten Books of Vitruvius illustrated the principles of design and construc-
 4 Vitruvius (1999)
                    
                      nandana
                      (Nandana)
                      
                    
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