PDF-to-PDF comparison
Compares BOM PDFs against supplier order confirmation PDFs and highlights mismatched quantities.
Windows desktop QA tool · BOM validation · PDF parsing
Validate BOM quantities against supplier order confirmations.
LAPSRS BOM Validator compares BOM PDFs with supplier order confirmation PDFs, detects quantity discrepancies, and exports human-reviewable Excel reports for procurement and industrial QA workflows.
Current branch: V30.3 stable experimental
V30.4 draft: length equivalence logic
$ lapsrs validate bom.pdf supplier-confirmation.pdf
✓ OCR repair heuristics applied
✓ Matched supplier lines against BOM entries
! 2 discrepancies require human review
✓ Excel report generated
Lowfalse positives
A–Mregression sets
.xlsxQA reports
Built for messy procurement documents
Conservative matching with aggressive detection.
LAPSRS is designed around real PDF failure modes: OCR damage, formatting noise, split lines, order confirmation quirks, and edge cases that still need manual sign-off.
OCR repair heuristics
Uses targeted cleanup logic to recover common extraction errors before matching.
Confidence scoring
Surfaces uncertain matches for human review instead of hiding ambiguous results.
Excel reports
Generates discrepancy workbooks suitable for QA handover, review, and record keeping.
Regression-tested
Validated against A–M datasets, including real discrepancies, OCR issues, and invalid/multi-document cases.
Installer-ready
PyInstaller EXE and Inno Setup installer builds are already working for Windows distribution.
How it works
From source PDFs to review-ready discrepancy report.
- 01
Load documents
Select the BOM PDF and supplier confirmation PDF inside the desktop app.
- 02
Extract and repair
Tesseract, Poppler, parser rules, and OCR repair heuristics normalise document text.
- 03
Match conservatively
Line items are compared while known risky cases are escalated rather than over-trusted.
- 04
Export report
An Excel discrepancy report is generated for procurement QA review.
Screenshots
Drop in real screenshots when ready.
The placeholders below are intentionally styled like product screenshots. Replace the SVGs in assets/screenshots with real app captures later.
Ready for release wiring
Point the download button at GitHub Releases.
Once the installer is uploaded to a release, replace YOUR-USERNAME/YOUR-REPO in this site with your actual GitHub repository path.
Version history
Changelog
Length equivalence logic
Draft branch for split-length and equivalent-length matching improvements.
Stable experimental parser branch
Improved OCR repair, parser confidence, mismatch detection, and regression harness behaviour.
Windows packaging
PyInstaller EXE builds and Inno Setup installer workflow confirmed working.
Support
Report parser issues with source PDFs and generated Excel output.
For best results, include the BOM PDF, supplier confirmation PDF, generated discrepancy report, app version, and a short note describing the expected result.