First and last move: narrowing the search

01

Begin with sequence, not totals

A total tells you how much motion the sensors recorded. Playback adds order: which positioned sensor triggered first, which followed, and where the last detection occurred before the record went quiet.

The edges of that sequence can provide a better field question than the busiest sensor alone.

02

Anchor every label to the floorplan

Sensor A only becomes useful evidence when everyone knows where Sensor A was placed. Record height, orientation, and the nearby building feature when those details affect what the sensor can detect.

• Confirm each sensor label before the monitoring night.
• Mark moved or obstructed sensors before comparing results.
• Read timestamps alongside position, not as an isolated event log.

03

Move toward the unanswered edge

If the earliest repeated detections cluster near one side of the monitored area, reposition a small number of sensors beyond that edge. The purpose is to ask a narrower question on the next night—not to manufacture a smoother path.

04

Finish with the building

Inspect the narrowed area for an actual opening or route. The floorplan playback directs attention; the physical condition establishes what should be repaired, sealed, or tested next.