What is evidence-based design?

• A. A design approach that defers to client preferences regardless of science.
• B. A concept used mainly in residential architecture.
• C. Architecture using the best available science to affect a desired outcome.
• D. A guideline strictly used for exterior lighting.

Answer: (C)

Evidence-based design means making design decisions driven by credible research and data to achieve specific outcomes for building users. It relies on the best available science rather than personal preference or tradition, and it applies across many design aspects—layout, acoustics, daylight, materials, and more—rather than being limited to a single domain like lighting or a particular building type. This approach guides choices to improve health, safety, well-being, performance, or other targeted outcomes, and often involves reviewing studies, post-occupancy data, and measurable results to inform decisions. For example, research showing that daylight and views can aid recovery leads to incorporating ample daylight and exterior views in a hospital design.