From time entries to payable hours
The arithmetic is simple — out − in − break, split at 8 hours, late minutes deducted — but multiply it by 30 guards × 30 days across a dozen posts and a few overnight shifts, and manual DTR processing becomes the slowest, most error-prone step of the payroll cycle. Every OT hour missed is underpayment; every phantom hour is margin lost, because what is on the DTR is also what gets billed to the client.