Progress invoices are invoices against Commitments and, therefore, are cost records. Progress Invoices act in a series. After the first invoice is saved for a commitment the next is generated by clicking the Create Next button. When you create the first invoice in the series the schedule of values lines from the original commitment is automatically copied into it. You can update the lines in a progress invoice by linking to approved Commitment COs and use Timesheets and Production records to update % complete.
Progress invoices can, if you wish, be created by vendors and submitted for your approval.
