Every new plan sponsor brings a new data problem. ADP, Paychex, QuickBooks, and regional payroll providers can deliver census, deduction, and 401(k) contribution data in different layouts and file types. For a recordkeeper, TPA, or benefits provider supporting hundreds of employers, the challenge is not running payroll; it is reliably ingesting, validating, normalizing, and scheduling those incoming files without turning every new sponsor into an engineering project.