Why two individually accurate BIM models can still land in completely the wrong place relative to each other the moment they're linked.
A structural engineer opens the architectural link, and the building appears half a mile away — rotated, floating below grade, nowhere near the structure. Both models are, individually, modeled correctly. Neither team made a modeling error. What's missing isn't accuracy — it's a shared coordinate systemtying the two files' separate, private origins together. Without one, "correct" is only ever correct relative to a model's own internal universe.