Periodic ATG tests gather data under what condition?

• A. During business hours
• B. When the facility is closed
• C. Only after a release
• D. Whenever a resident is present

Answer: (B)

Periodic ATG tests gather data when the facility is closed because you want a stable, low-variability environment for accurate measurements. When the building is unoccupied and operations are paused, there are fewer fluctuating factors—like people moving around, doors opening, and HVAC loads changing—that can mask the true baseline readings of the system being tested. Running the test in a closed state also reduces safety risks to residents and staff during data collection and simplifies scheduling and access for testers.

If tests were done during business hours, the added activity and varying conditions would muddy the data and make it harder to interpret whether the system is performing as intended. Testing only after a release is not about routine data collection; it’s tied to incident response. And testing whenever a resident is present would be disruptive and unsafe, introducing variables and potential exposure.