Market Survey Data Verification

I have a completed set of market-research survey responses that now need a precise data accuracy check. Your role is to comb through the raw files, confirm that every entry follows the survey logic, flag inconsistencies, and deliver a clean, verified dataset ready for analysis.

The work involves:
• Cross-checking answer validity, skip patterns, and quotas
• Identifying duplicates or illogical responses
• Documenting every correction in a succinct audit log

Please use the spreadsheet or statistical tools you are most comfortable with—Excel, Google Sheets, Python (pandas), or R are all fine—as long as the final hand-off includes:
1. The corrected data file in its original format
2. A separate verification report summarising issues found and actions taken

Accuracy is paramount, so let me know your typical turnaround time and any similar projects you have handled. I am ready to start as soon as I find the right specialist.