Which post‑survey measurement best represents an AP's cell edge?

RSSI (Received Signal Strength Indicator) is the best post-survey measurement to represent an AP's cell edge because it directly indicates the strength of the signal received by a client device from that AP. The cell edge is defined by the point where the signal strength becomes minimal for reliable connectivity. While SNR (Signal-to-Noise Ratio) is crucial for data rates, it's a ratio of signal to noise, not just signal strength. Noise alone doesn't define the cell edge but contributes to SNR. CCI (Co-Channel Interference) indicates interference from other APs on the same channel, which impacts performance but doesn't directly measure the cell edge of a single AP.