The Software Payment Form is used to generate purchase orders against a software contract to encumber funds and facilitate the processing of invoices and payments. The Software Payment Form should be established after Purchasing Services has generated your contract, and before payments against the contract are to begin.
See detailed information at this link: https://pitt.sharepoint.com/sites/purchasepaytravel/pantherexpresssystem/SitePages/Software-Payment-Form.aspx