Tell me about a time when an unstable process is treated as capable. What did you do?

I first confirmed the facts and contained the immediate impact. Next, I reviewed SPC chart, Cpk study, MSA, and reaction records and coordinated the action to review control limits, Cpk, special causes, reaction plan, and measurement system. After verifying the result, I summarized the root cause, preventive control, owner, and follow-up plan so the issue would not recur.