It is not a perfect copy
Every model includes only selected variables and assumptions.
Data keeps models connected to reality
Sensors, asset records and surveys can update parts of the representation.
Use cases differ
Traffic planning, energy analysis and asset management may need very different digital twins.
Model limits must stay visible
A detailed visualization can still produce poor conclusions if inputs or assumptions are weak.
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.