This X12 Transaction Set contains the format and establishes the data contents of the Vendor Performance Review Transaction Set (501) for use within the context of an Electronic Data Interchange (EDI) environment.  This bi-directional transaction set can be used to request and receive past performance information.  The transaction set may also be used to challenge the validity of the information received and to respond to challenges.

This transaction set can be used by selling parties to request, receive, and challenge historic information regarding their performance on contracts in the areas of capability, eligibility, quality assurance, and delivery performance.