What is the primary goal of functional performance testing?

• A. To verify that systems meet design intent and operate under intended conditions
• B. To verify only energy efficiency
• C. To verify only installation quality
• D. To verify warranties

Answer: (A)

Functional performance testing aims to confirm that the system actually operates as it was designed to, under the conditions it will face in the building. It validates that equipment, controls, and sequences of operation work together to meet the design intent and the owner's requirements, not just that components are installed or that energy use is optimized. By testing start-up/shutdown, part-load responses, occupancy impacts, and typical and extreme operating scenarios, it ensures setpoints, control logic, interlocks, alarms, and fail-safes behave as planned and that performance aligns with the design criteria across the expected range of conditions. Verifying energy efficiency, installation quality, or warranties alone do not capture this holistic, system‑level confirmation of actual operation.