# Surveillance and Early Warning **Entity class:** Protective sensing function ## Definition **Surveillance and early warning** joins persistent observation with analytic methods that detect changes, anomalies, preparations, and emerging hazards early enough to support preventive action. Surveillance supplies the observations; warning turns them into assessed implications and decision time. ## Relevance to this collection It connects [[wiki/Early Warning|Early Warning]], [[wiki/Real-Time Observability|Real-Time Observability]], [[wiki/Anomaly Detection|Anomaly Detection]], [[wiki/Predictive Intelligence|Predictive Intelligence]], and [[wiki/Paul Scharre|Paul Scharre]]. ## Relationships - **master collection:** [[collections/Terrorism, Counterterrorism, and the Intelligence Environment|Terrorism, Counterterrorism, and the Intelligence Environment]]. - **intellectual neighborhood:** [[wiki/Intellectual Neighborhood of the Counterterrorism Collection|Intellectual Neighborhood of the Counterterrorism Collection]]. ## Sources / Provenance - [Office of the Director of National Intelligence, Intelligence Community Directive 203, *Analytic Standards*, January 2, 2015](https://www.dni.gov/files/documents/ICD/ICD%20203%20Analytic%20Standards.pdf). **As of:** 2026-09-23