High Level, Long-term Oversight
Bill Wilson, Analyst, Canada, SIG Leader
I agree with other respondents that process owners / responsible orgs should be the immediate owners for corrective action plans.
However, in the long run, I believe there needs to be some high level oversight of all such corrective action efforts. Depending on the RCA's level of significance, that higher level oversight may be needed from the very top reaches of the management team.
The focus of that oversight ought to be on issues like quality of RCAs and corrective actions, effectiveness of corrective actions that have been completed. And ensuring that the responsible org is doing what it takes to achieve sustainable long-term performance improvement (with little or no recurrence of the original problem).