Slash sheets are the first step in a four-step methodology for annotating a part in the QPL. They are the specification written by the governmental party that has a primary interest in a part. After a slash sheet is created, the vendor fabricates the part on the process line intended to be uniquely qualified to supply the part. In the third step, the vendor tests the part extensively to verify that it conforms to its specification. Finally, a Designation Change Order (DESC) specifies end-of-line testing required each time the vendor fabricates the part to screen for anomalous defects. Depending on the application of the part, the manufacturer may apply these end-of-line tests on every part or on a sample of parts from each lot.