A practical network
The watch receives local alarms, reports from people, and information from suitable machines. It sends an assignment to a qualified responder and makes a route visible before a problem becomes a crowd of conflicting instructions.
Technical, medical, flight, and field teams keep their own decisions. Watch coordination helps them arrive with the right context; it does not turn the town into a remote-controlled system.
How the system fits together.
Find this in the novel: Chapters 6, 22.