Accuracy

Accuracy · 27 Aug 2026

Recall, precision and correctness: the three numbers a BIM model from a scan needs

A short, concrete definition of the three scores we use for every model, why two of them can be perfect while the model is a metre out of place, and how to compute them on your own building with a reference model.

Accuracy · 9 Aug 2026

Scan-to-BIM accuracy: what the numbers mean, and which ones to ask for

Every vendor says "high accuracy". Here is how to read a scan-to-BIM accuracy claim, the two numbers that must appear together, and a worked example on a real building.