Measuring what has actually been built, against the model and the programme, from site updates, scans, photos or drones, so delays show up in weeks rather than months.
Model-based progress tracking records what has been built by marking model elements as installed (or comparing the model with scans and photos), then compares that with the plan. The result is progress you can see by floor, zone and trade, and a measure of earned work that is harder to argue with than a percentage someone wrote in a meeting.
Automated tools (often marketed as AI) work best on large, visible elements: columns, walls, slabs, ducts. They struggle with small items and anything covered.
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