I am preparing an FR5 faceplate inspection station and our example images are being labelled before we have reliable references. Bright streaks move with small presentation changes, yet people call them scratches. What should I establish about the physical pieces and capture conditions before commissioning and threshold work?
Can you still identify and retrieve the physical faceplates behind those images? Ask the acceptance owner to examine those pieces under an agreed viewing method. I would not use the image labels to decide their physical condition.
Yes, the original faceplates are retained with image identities. I can ask quality to examine them; no independent decisions have been recorded for these examples yet.
Keep a decision per physical faceplate, including any undecided region, and link each capture to that identity. A folder called good is a poor database once someone starts copying crops into presentations.
The holder configuration belongs with the capture as well. If maintenance later replaces or adjusts it, the next person needs to know what presentation the image comparison actually established, not just which exposure produced a clean picture.
Jamie, record removal and reseating in the comparison too. Repeated frames of an untouched plate can look consistent while never testing the presentation difference Ingrid described.
Quality has examined the retained pieces and marked one disputed streak region as acceptable surface. Another piece has a confirmed scratch elsewhere. We have physical decisions now, but no repeatability result for the imaging arrangement.
And retain the misleading old captures as evidence of the presentation problem, separate from the tuning set. Their history remains useful even after the labels attached to them are corrected.
I've linked quality's decisions to the pieces and kept the old captures outside the tuning references. The proposed comparison records holder, lighting and reseating; I will not describe that plan as a validated inspection method.
Who will store those reference faceplates between comparisons? A labelled image survives a meeting more easily than a small part left on somebody's bench, and future support needs both.
Also agree when a reference needs re-examination. I don't know your handling conditions, but the original physical judgement should not be assumed unchanged after damage or a replacement sample.