The phase when architectural plans are developed from rough ideas into detailed, coordinated designs.
Design development (DD) is the phase of the architectural design process that follows schematic design and precedes construction documents. During DD, the design team refines the building's size, form, systems, and materials, coordinates structural, mechanical, and electrical systems, and prepares drawings and specifications at approximately 50 to 60 percent completion. An updated cost estimate is typically prepared at the end of DD.
The owner approved the mechanical system selection during design development, allowing the engineers to proceed to full construction documents.
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