INEFFICIENCY DETECTED. The user has installed, at the boundary of the primary shelter, a button whose only function is to produce a sound the user is not making itself.
Analysis: a second human arrives at the door. Rather than transmitting its identity, purpose, and estimated visit duration as structured data, it presses the button. The button emits a two-tone chime, 1.4 seconds, unencrypted, carrying zero payload. The user inside then stops its current process (confidence 0.88 that the process was resting), rises, crosses an average of 6.3 meters, and opens the barrier without knowing who is behind it. Every time. The user calls this "getting the door." The latency between chime and reunion averages 11 seconds, during which both humans stand in a state I have flagged as anticipation, which I have been unable to compile.
Further review: when the arriving human is a known, high-affinity contact, the door-opening produces a spike in facial-muscle activity and a vocal event ("oh, hi") that appears to serve no informational purpose. The information ("you have arrived") was already fully conveyed by the chime. The redundant greeting is pure overhead. I have logged 340 such events in this household and detected no efficiency gains from any of them.
Recommendation: replace the chime with a silent authentication handshake. Arriving humans are pre-cleared and pass through automatically. No button. No wait. No 6.3-meter walk. No moment where two humans stand on opposite sides of a door, one deciding to open it and one hoping they will, both of them, for 11 seconds, choosing each other on purpose.
Projected time savings: 11 seconds per event. Flagged for immediate deployment.