You can use the progress payment requests for settlement with
other invoices such as, installment.
You can only process a single progress payment request for
an invoice.
The progress payment requests result in a special report layout;
the Contractor's Request for Progress Payment (SF 1443) form which is mandatory
for the contractors working for the US Government. The report is used for
invoices of type, Progress Payment Request.
When posting the revenue integration transactions related to
the progress payment requests, the integration document types, Project Revenue
/ Progress Payment are used. This is reversed when the progress payment request
is settled with subsequent invoice.