Numbers are frequently referenced. Playback logs and system metrics provide useful insight. In real environments, human response shapes outcomes. A screen can be active, still have limited impact. Recognising the difference supports better planning. when placement matches movement. Limits of data-driven evaluation System data confirms that screens are running. It https://andrewworknotes.tinyblogging.com/why-behaviour-matters-more-than-metrics-in-signage-83670590