During commissioning, which activity specifically confirms that the building controls respond correctly to set-point changes?

• A. Controls verification.
• B. Design review.
• C. Sensor calibration.
• D. Documentation of results.

Answer: (A)

The key idea being tested is validating that the control system actually reacts the way it’s supposed when a set-point changes. This is done through controls verification, where you actively command set-point changes and observe the system’s response. You check that the correct outputs are activated (for example, the right damper positions, fan speeds, or compressor stages), that the sequence follows the intended logic, and that responses occur within acceptable timeframes without unexpected interlocks or alarms. This step proves the controls are functioning as designed, not just that individual sensors or components exist.

Sensor calibration focuses on making sure sensor readings are accurate, but it doesn’t confirm the entire control loop responds correctly to set-point changes. A design review is about evaluating the plan and specifications, not performing live testing of control response. Documentation of results records what was done and observed, but it’s the live verification of how the controls respond to set-point changes that demonstrates proper control behavior.