Engagement Signal Decay

Engagement Signal Decay is the principle that proposal analytics lose predictive value the longer a sent document sits unopened or partially read. A quote viewed for 90 seconds on day one and signed on day two is a different sales event than the same quote opened four times across eleven days with no signature. Agencies that treat open-rate dashboards as a scoreboard rather than a timing trigger miss the window where a follow-up call still lands warm. The practical rule: define a decay threshold per deal size, then route anything past it to a human touch instead of an automated nudge. Qwilr and Proposify both surface per-page time and click behavior, and PandaDoc bundles approval and payment collection into the same tracked document, so the telemetry exists. The framework is about acting on it before the signal goes cold. For retainer renewals, a proposal that decays past threshold usually signals scope confusion, not price resistance, which changes the follow-up script entirely.