According to the CRISC Review Manual (Digital Version), the percentage of successful changes is the most effective key performance indicator (KPI) for change management, as it measures thequality and effectiveness of the change management process and its alignment with the organization's objectives and requirements. The percentage of successful changes helps to:
Evaluate the extent to which the changes have met the expected outcomes and benefits Identify and analyze the root causes of any failed or problematic changes and implement corrective actions or improvement measures Monitor and report the performance and progress of the change management process and its impact on the organization Enhance the confidence and satisfaction of the stakeholders and customers with the change management process and its results References = CRISC Review Manual (Digital Version), Chapter 2: IT Risk Assessment, Section 2.4: IT Risk Scenarios, pp. 107-1081

Vulnerable firmware that lacks updates is a significant security risk, as it can be exploited by attackers.
Addressing this issue aligns with Secure IoT Deployment Practices to reduce exposure.

Risk appetite is the broad-based amount of risk that an organization is willing to accept in pursuit of its objectives. Risk appetite reflects the level of risk that the organization is prepared to take to achieve its strategic goals, and provides guidance and boundaries for the risk management activities and decisions. To define the risk management strategy, which is the plan and approach for managing the risks that may affect the achievement of the organization's objectives, the factor that must be set by the board of directors is the risk appetite. The board of directors is the highest governing body of the organization, and has the ultimate responsibility and authority for setting the direction and oversight of the organization. By setting the risk appetite, the board of directors can communicate its expectations and preferences for the risk exposure and performance of the organization, and ensure alignment with the business objectives and strategies. References = 3

The most important benefit of key risk indicators (KRIs) is providing an early warning to take proactive actions, because this helps organizations to prevent or mitigate potential risks that may impact their operations, objectives, or performance. KRIs are specific metrics that measure the level and impact of risks, and provide timely signals that something may be going wrong or needs urgent attention. By monitoring and analyzing KRIs, organizations can identify and assess emerging or existing risks, and initiate appropriate risk responses before the risks escalate into significant issues. This can enhance the organization's resilience, competitiveness, and value creation. The other options are less important benefits of KRIs. Assisting in continually optimizing risk governance is a benefit of KRIs, but it is not the most important one. Risk governance is the framework and process that defines how an organization manages its risks, including the roles, responsibilities, policies, and standards. KRIs can help to evaluate and improve the effectiveness and efficiency of risk governance, but they are not the only factor that influences it. Enabling the documentation and analysis of trends is a benefit of KRIs, but it is not the most important one. Documenting and analyzing trends can help organizations to understand the patterns, causes, and consequences of risks, and to learn from their experiences. However, this benefit is more relevant for historical or retrospective analysis, rather than for proactive action. Ensuring compliance with regulatory requirements is a benefit of KRIs, but it is not the most important one. Compliance is the adherence to the laws, regulations, and standards that apply to an organization's activities and operations. KRIs can help to monitor and demonstrate compliance, but they are not the only tool or objective for doing so. References = Why Key Risk Indicators Are Important for Risk Management 1

Key risk indicators (KRIs) are metrics that provide information on the level of exposure to a given risk. Key control indicators (KCIs) are metrics that measure the performance or effectiveness of a control in mitigating a risk. KCIs provide input for KRIs, because they help to assess the residual risk after applying the control.
For example, if the KRI is the number of security incidents, and the KCI is the percentage of incidents detected by the intrusion prevention system (IPS), then the KCI provides input for the KRI by showing how well the IPS is reducing the risk of security breaches. References = CRISC: Certified in Risk & Information Systems Control Sample Questions