Power is a common dependency
Loss of electricity can affect pumping, communications, signals, buildings and service facilities.
Transport can be a dependency too
Blocked roads can delay repair crews, deliveries and waste collection.
Cascades depend on duration and redundancy
A short outage with backup arrangements differs from a long regional disruption.
Dependency analysis finds priorities
Understanding which services support many others helps resilience planning.
Scope boundary. This page explains system relationships at a planning level. Real utility, transportation, emergency, structural, electrical, cybersecurity and public-safety decisions require local agencies and qualified professionals.