The best way to ensure the implementation of corrective action plans is to assign accountability to risk owners. Corrective action plans are the plans that describe the actions and resources that are needed to correct or improve the performance or compliance of the processes or controls. Risk owners are the persons who have the authority and responsibility for managing the risks and their responses. By assigning accountability to risk owners, the implementation of corrective action plans can be monitored, evaluated, and enforced, and the results and outcomes can be reported and communicated. The other options are not as effective as assigning accountability to risk owners, as they are related to the training, scheduling, or outsourcing of the corrective action plans, not the oversight or governance of the corrective action plans. References = Risk and Information Systems Control Study Manual, Chapter 4: Risk and Control Monitoring and Reporting, Section
4.4: Key Control Indicators, page 211.