The document discusses the theory of design and constraints involved in the interior design process. It explains that there are scientific and unscientific theories, and interior design draws on aspects of environmental psychology and architecture. When designing interiors, a common style and theme should run throughout linked spaces. Some key principles discussed include balance, focal point, rhythm, details, scale and proportion, color, and the steps of the interior design process. The document notes that every design project has unique constraints related to the client, program, codes, context, site, technology, cost and schedule.
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