Tell me about a time when a functional defect escapes to final inspection or customer. What did you do?

I first confirmed the facts and contained the immediate impact. Next, I reviewed FCT program, golden unit correlation, and defect analysis and coordinated the action to verify test sequence, limit, firmware, fixture, and reference unit. After verifying the result, I summarized the root cause, preventive control, owner, and follow-up plan so the issue would not recur.