35 Million Documents Could Not Be a Manual Project 🔥
Manual classification would take 3.5 years.
The deadline was 6 months.
A regional bank needed to classify 35 million historical documents for compliance.
THE PROBLEM:
- 40 years of accumulated files
- Retention rules depended on document type
- Sensitive data had to be identified
- Manual reviewers could not meet the deadline
- Regulators wanted proof of a working classification system
THE n8n WORKFLOW:
- Batch processor pulls archive files in chunks
- Parser extracts text and metadata
- Classifier assigns document type
- Retention node maps policy by category
- Sensitive data detector flags PII and financial fields
- Confidence threshold routes low-score docs to human review
- Dashboard tracks volume, accuracy, and completion
THE RESULTS:
- 35M documents processed in 11 days
- 6% routed to human review
- Random sample validation: 98.7% classification accuracy
- 11.3M files marked eligible for retention-based disposal
- Regulatory deadline met early
THE LESSON:
When manual math says “years,” adding more people is usually not the answer.
Change the processing model.
What archive project is sitting untouched because the manual estimate looks impossible?
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35 Million Documents Could Not Be a Manual Project 🔥
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