Bangladesh RMG groups process large factory workforces with complex shift premiums, overtime, attendance-linked pay, festival bonuses, and allowance types that vary by unit and buyer programme. Pre-payroll QC still depends on sampling variance reports and eyeballing outliers while duplicate bank accounts, terminated workers still active, sudden overtime spikes, and mis-coded line incentives hide in volume.
Data spans HRIS, time and attendance devices, manual adjustment spreadsheets, and payroll engines — often differently integrated across Dhaka HQ entities and satellite factories. Each buyer audit season or capacity ramp introduces edge cases. Manual overrides lack consistent audit trails. Shared payroll teams serve multiple factories with different calendars, pay groups, and statutory rules, multiplying exception types.
The cost is trust as much as cash. Overpayments are painful to claw back from line workers; underpayments trigger floor unrest and union attention. Fraud patterns are rare but reputationally severe when they involve ghost overtime or collusion. HR and finance point at each other while employees escalate on WhatsApp groups supervisors cannot ignore.
Payroll ops owns run integrity; factory HR owns master data and attendance exceptions; finance owns GL posting; internal audit owns control testing. Anti-patterns include alerting on every tiny variance, auto-blocking payouts without an owner, and baselines that ignore entity-specific shift rules — training analysts to ignore the queue.
Buyer-mandated production bonuses and line-performance incentives create pay patterns that differ from generic manufacturing baselines — anomaly logic must encode those programmes or false positives erode payroll trust.
For RMG, AI payroll anomaly detection must score unusual patterns before finalise, explain why a line is flagged, and route to the right owner under cut-off discipline — leaving approve and reject with humans who understand factory pay reality.