Tell me about a time when real defects are missed or good boards are over-rejected. What did you do?

I first confirmed the facts and contained the immediate impact. Next, I reviewed AOI program revision, defect images, and verification result and coordinated the action to review program coverage, threshold, golden sample, and false-call rate. After verifying the result, I summarized the root cause, preventive control, owner, and follow-up plan so the issue would not recur.