[LT-03]
The 22.7% Precision Problem in Production
A 2024 benchmark study of Microsoft Presidio — the open-source PII detection engine used in legal technology, healthcare, and enterprise data protection applications — found a 22.7% precision rate for person name detection in business document contexts.
Precision measures the accuracy of positive identifications: what percentage of the items the tool flagged as "person names" are actually person names. At 22.7%, approximately **77 out of every ...