Abstract: Maintaining consistency and freshness of information about an operational system, assuring consistent actions by system actors, assuring that system elements use only a single global status of the system for any particular status time, assuring that each pair of elements acts only upon consistent status values, assuring that system elements operate only with status values measured sufficiently recently to be reliable. Information collectors respond to status values. Information containers respond to information collectors, maintaining status values and metadata indicating whether those status values are reliable, or are consistent with respect to known correct values. Information conditions respond to information collectors or information containers, maintaining logical consistency with a unified global status. System actors respond to information containers or information conditions, acting logically consistent with that global status.