Using the symptom-record record

Fictional planning example only. No customer, test result, supplier acceptance or approval is provided.

Identify each affected and apparent reference sample with actual bottle lot, label order and artwork revision.
Record where and when the symptom appears. Missing observations remain blank; an unaffected-looking sample is not a validated control.
Ask the bottle, process and converter owners for missing facts. Agree a comparison that identifies changed variables and limits.
Record the next owner, evidence and decision; a symptom does not prove a cause.