The purpose of the Design Guide for Interiors is to provide support to customers and designers in the creation of functional and aesthetic interior designs for facilities. The design guide addresses the full spectrum of design-related issues before the interior designer, with discussions of design theory, building technology, material resources, application, and criteria for selection of materials and products. The intent is to provide a common basis to communication and understanding of critical subject matter for the architectural and interior designer, so that facilities may be made harmonious in function and appearance.