Printers read proof against copy, letter by letter, because the eye that skims is the eye that passes errors. Frames at this desk are judged the same way: read against the broadsheet card, line by line, in a fixed order, before any admiration is allowed. A record written in measurements can be proofed; a record written in impressions can only be agreed with, generously — which is how drift gets printed as truth.
The proofing order never changes. Identity first: the frame read against the five lines; one failed line ends the reading. Craft second: hands, edges, light direction, background clutter. Purpose third: what job was this frame set to do — cover, feed piece, first frame of a clip? A frame with no purpose is a cull however fine it looks standing alone.
Keepers are finished in the same clerical order: repair first, swap second, upscale last — and each finisher reads the card again before it starts, because the sheet, not the previous frame, is the standard. The previous frame may itself have slipped off the record.
Exact copy, exact proofing. A studio that proofs its characters properly never has to argue about who a frame was supposed to be.