Explanation
During post-incident reviews, the highest priority should be given to evaluating the effectiveness of the incident response effort. This includes assessing the accuracy of the response to the incident, the timeliness of the response, and the efficiency of the response. It is important to assess the effectiveness of the response in order to identify areas for improvement and ensure that future responses can be more effective. Documenting the actions taken in sufficient detail, updating key risk indicators (KRIs), and evaluating the performance of incident response team members are all important components of a post-incident review, but evaluating incident response effectiveness should be given the highest priority.

Explanation
Executive management may not take action related to a risk if they have determined that the cost of implementing necessary controls to mitigate the risk exceeds the potential financial losses that the organization may incur if the risk were to materialize. In cases such as this, it is important for the information security team to provide the executive team with thorough cost-benefit analysis that outlines the cost of implementing the controls versus the expected losses from the risk.