Weprogressed towardmarketadoptionby developing, build-
ingand testingprototype systems usingnumerical simula-
tion tools andfield tests,by working with industry andmanu-
facturing partners, and by demonstrating the technologies in
full-scalecommercialbuildings. Thisprovidedabroad,highly
defensible record of documented performance.

Prototypeswere developed in cooperationwith industrypart-
ners to speed commercializationand to work out market bar-
riers to full-scaleadoption.Industrypartners in glazing, win-
dow systems, shading systems, controls hardware and light-
ing were solicited to participate. Feedback through trade as-
sociations, conferences and industry associations helped to
identify potential obstaclessuch asdifficulties with cross-dis-
ciplinary design, operation and maintenance concerns and
manufacturing processes.

Because these systems cross traditional component bound-
aries, marketingand commercializingintegrated products
pose unique challenges; i.e., will it be sold by a windows or
lightingsystems manufacturer?Perhaps the best solution
would be to define a new sub-industry where envelope and
lightingsystems could be tailored and assembled for indi-
vidual clients by "system integrators."

Issues surrounding intelligent building systems--suchascon-
trol-system protocol, control linkages from the zone level to
whole buildingscale and hardware-to-softwareheuristics--
are being addressed by the research, engineering and manu-
facturingcommunities. Skepticism abounds whenactively-
controlled systemsareproposed, primarily due to poorbuild-
ing operation and maintenance practices in the United States.
The light-redirecting systemsprovide static solutions, but for
the large variability in exterior and interior buildingcondi-
tions, dynamic systemspromise optimum solutions on a real-
time basis throughout the year.