Reevaluating the design of the key risk indicators (KRIs) is the best recommendation when a KRI is generating an excessive volume of events, because it helps to determine whether the KRI is relevant, reliable, and valid, and whether it needs to be modified or replaced. A KRI is a metric or indicator that helps to monitor and evaluate the likelihood or impact of a risk, or the effectiveness or efficiency of a control. A KRI can be quantitative or qualitative, and can be derived from internal or external sources. An event is an occurrence or incident that may indicate a change or trend in the risk level or performance. A KRI that generates an excessivevolume of events may indicate that the KRI is not well-designed or well-aligned with the risk objectives or criteria, and that it may produce false positives or negatives, or irrelevant or misleading information. Therefore, reevaluating the design of the KRIs is the best recommendation, as it helps to improve the quality and usefulness of the KRIs, and to avoid unnecessary or inappropriate actions or responses.
Developing a corresponding key performance indicator (KPI), monitoring KRIs within a specific timeframe, and activating the incident response plan are all possible actions to perform after reevaluating the design of the KRIs, but they are not the best recommendation, as they do not address the root cause of the excessive volume of events. References = Risk and Information Systems Control Study Manual, Chapter 3, Section
3.3.2, page 97