Start with the cost of a wrong field
A document workflow does not have one uniform level of risk. A document date might be easy to correct, while a payment amount or reporting figure can change a consequential decision. Treating every extracted value the same creates review in the wrong places.
Before choosing extraction technology, list the fields the workflow produces and what happens next to each one. A useful review gate is designed from that downstream consequence, not from a generic confidence threshold.
- Identify the decision or system each field feeds.
- Record who can recognise and correct an error.
- Separate formatting problems from values that change meaning.
Give each field an explicit route
Once the fields are visible, assign each a route. Some may pass when the source and validation agree. Some should always require approval. Others should stop the workflow when required evidence is missing.
This creates a more understandable operating model than a single score for the whole document. It also lets reviewers see why a particular item reached their queue.
- Pass: the value meets agreed validation and needs no routine review.
- Review: a person must confirm the value before it continues.
- Stop: a required field, page or check is missing, so downstream work waits.
Make confidence evidence, not a verdict
Extraction confidence can help prioritise review, but it should not be the only explanation shown to a person. Pair it with useful evidence: the source page, the surrounding text, the table cell position and any validation that failed.
A low-confidence value with clear evidence may be quicker to resolve than a high-confidence value with no visible source. The interface should help the reviewer decide, not ask them to trust a number about another number.
Keep the original and the correction together
A review gate becomes more useful when the original source, extracted result and approved correction remain connected. That record supports quality checks and makes recurring failure patterns easier to find.
Corrections can reveal that a supplier changed a layout, a scan cuts off a column, or a business rule needs refinement. The goal is not merely to fix one document; it is to learn where the workflow needs attention.
Test the awkward documents first
A narrow set of clean PDFs will not exercise the review model. Include representative scans, split tables, ambiguous labels, missing pages and values that resemble the right answer but sit in the wrong place.
Agree the expected route for each test document before running it. The result should show not only whether the text was extracted, but whether the workflow paused, escalated and preserved evidence as designed.