so CHAPTER 3 resulting in open-market buildings that embody commonly held values even though users did not participate directly in the design. One example is the Levittown development tract (Gans, 1967), which included such design ele- ments as pitched roofs, picture windows, and large front lawns. In another tradition, designers contract with individual clients who request styled, one-of—a-kind buildings. Clients pay for the building, criticize it during design, and eventually use it personally. To determine clients’ needs, designers negotiate with them to reach an agreement on design. In such settings clients may delegate considerable authority to the professionals they pay because they want to benefit from the special expertise these professionals have: expertise about such things as style, methods, and materials. The most dramatic postindustrial development in environmental design began when people concentrated around factories in cities and new technology enabled construction of large buildings. Governments, factory owners, corpo- rations, and other often well-intentioned groups of people contracted with designers to construct settings and objects for masses of people to use daily: parks, furniture, schools, hospitals, appliances, playgrounds, offices, dormito- ries. In mass design like this, designers have two clients: those who pay for what is built and those who use it (Madge, 1968). The user client has no choice and no control. This situation presents designers with a problem: no matter how much they negotiate with paying clients, it is difficult to plan for the needs of user clients, who are neither well known nor readily available to plan with. To solve or at least improve the user client problem, designers, adminis- Paying clients /// / / I \ // / // I \ / // Designers F: Gap User clients I, . L1 The user-needs gap. trators, researchers, users, and others have developed mechanisms that change the boundary between designers and user clients. Citizen-participation tech- niques that include user clients as members of design teams, giving them con— trol that is traditionally reserved for paying clients, is one way to change the boundary. Flexible building frameworks, with partitions and even alternative facades (Habraken, 1972; Wampler, 1968), provide user clients with more direct control over their surroundings by enabling them to adapt a structure themselves. Each design case study in this book highlights inventive techniques a team of designers and an E-B consultant has employed to change the bound- aries among designer, researcher, paying client, and user clients. E-B research changes the boundary by making more visible to designers the needs, desires, and reactions of users to their surroundings, thus enabling designers to better