For air quality monitors, a sound approach must identify each sensor and unit, placement, warm-up and averaging interval, indoor activities, outdoor conditions, ventilation changes, detection range, calibration or co-location evidence, drift, interference, missing data, and the decision a reading will inform.
The practical focus is the interpretation of results. It uses sensor target, averaging interval, and sensor drift to explain what changes the outcome, where uncertainty enters, and which response is proportionate.