Dumb Question - ADP Import

Running GP10SP5.  I see where an ADP comma delimited file can be imported (Tools>Integrate>Import from ADP) but, and this may seem like a dumb question, but if companies are not using Payroll how are they supplying ADP with the data for them to create this file for companies to import?  In other words, what do companies do to track employee time if they are not using Payroll.  Thanks.