What are confidence scores.
Every extracted instrument includes a confidence score. It's a single indicator of how certain the extraction is, used to help you prioritize review.
Color coding
In the review interface and Excel export.
- Green, High confidence. Likely correct. Quick scan is usually sufficient.
- Yellow, Medium confidence. Worth checking.
- Red, Low confidence. Needs review. The tag may be misread, truncated, or from a non-standard symbol.
Common causes of low confidence
- Poor scan quality, blurry or low-DPI images make small text hard to read
- Non-standard symbols, company-specific instrument symbols not in ISA 5.1
- Overlapping text, annotations covering instrument bubbles
- Unusual tag formats, non-ISA naming conventions
- Truncated codes, "TI" read where the drawing actually shows "TIC"
Review strategy
For efficient review, focus on.
- Red items first, these have the highest chance of errors
- Yellow items, spot-check a few to gauge overall accuracy
- Green items, scan quickly for obvious mistakes, but these are usually correct
- Signal class "REVIEW", these are indicators, gauges that may or may not need I/O points