Independent proof-of-concept demonstration, not a paid client commission. Using a publicly supplied five-sheet workbook containing 10,000 Umrah records and 25,000 transactions, I prepared a reconciled dashboard with linked filters, four charts and an executive PDF. All 221 filter combinations were checked in Apache OpenOffice Calc. The originals were preserved and uncertain records were flagged rather than silently corrected. The attached image shows aggregate results only. The source data’s authenticity and representativeness were not independently verified, and this example does not claim a customer outcome. For commissioned work, file counts, rows, columns, outputs, turnaround and revision limits would be agreed after reviewing representative inputs. Deliverables can include cleaned CSV/ODS or Calc-checked XLSX, reusable Python scripts and a source-linked exception log.
- Data Analyst