Building Information Modeling (BIM)
A 3D digital model of a project, structural, architectural, and MEP systems modeled together with real data attached to every element, used to design, coordinate, and increasingly build a project, rather than a purely visual 3D rendering with no underlying data behind it.
Why it matters
A 2D drawing set can show a duct and a structural beam in the same location on two separate sheets without anyone noticing until the conflict shows up in the field. A coordinated BIM model surfaces that same conflict, a [[concept-clash-detection|clash]], on a screen during design, where it costs a model update instead of cutting into installed work.
On a real project
Before steel erection begins, the project team runs a coordination review across the structural, mechanical, and electrical models and finds a duct routed directly through a structural beam, a conflict resolved with a model revision instead of a field rework order once the beam is already up.
Who this matters most to
A BIM/VDC Specialist builds and maintains the model as the project's single coordinated source of truth across every trade. A Project Manager relies on the model's accuracy for everything from quantity takeoffs to resolving field conflicts before they become change orders.
Where this goes wrong
A project team treats the 3D model as a visualization tool rather than a coordination tool, skipping a scheduled clash detection pass to save time before a milestone review. A duct-versus-beam conflict the pass would have caught instead surfaces in the field after the beam is already installed, turning a model fix into an expensive rework.
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