Tell me about a time when old and new revisions are mixed during changeover. What did you do?

I first confirmed the facts and contained the immediate impact. Next, I reviewed the approved ECN, cut-in plan, and traceability record and coordinated the action to review implementation timing, affected models, stock, and tooling. After verifying the result, I summarized the root cause, preventive control, owner, and follow-up plan so the issue would not recur.