= Residual risk is the risk that remains after applying security controls. It reflects the actual exposure of the organization to noncompliance issues. Therefore, basing mandatory review and exception approvals on residual risk is the best approach for governing noncompliance with security requirements. It ensures that the organization is aware of the potential impact and likelihood of noncompliance and can make informed decisions about accepting, mitigating, or transferring the risk. References = CISM Review Manual 15th Edition, page 78.