Key risk indicators (KRIs) are most useful during the monitoring phase of the risk management process, as they provide timely and relevant information on the current and future risk status and performance. KRIs are metrics that measure the level of risk exposure and the effectiveness of risk response strategies, and they have predefined thresholds that indicate the acceptable or unacceptable risk status. By monitoring the KRIs, the risk practitioner can identify and report any changes or deviations in the risk level, and take appropriate actions to manage the risk. KRIs are not most useful during the analysis, identification, or response selection phases, as they do not help to assess the likelihood or impact of the risk, to find the sources or causes of the risk, or to evaluate or choose the optimal risk response option. References = CRISC: Certified in Risk & Information Systems Control Sample Questions, question 222.