Changes to data sensitivity during the data life cycle present the greatest risk for a global organization when implementing a data classification policy, as they may result in data being under-protected or over-protected, leading to potential data breaches, compliance violations, or inefficiencies. Data sensitivity refers to the level of confidentiality, integrity, and availability that the data requires, and it may changedepending on the data's creation, storage, processing,transmission, or disposal. A data classification policy should consider the changes to data sensitivity during the data life cycle and ensure that the appropriate controls and procedures are applied at each stage. Data encryption not applied to all sensitive data, many data assets that need to be classified, and changes to information handling procedures not documented are not the greatest risks, as they do not affect the data classification policy itself, but rather the implementation or execution of the policy. References = CRISC Certified in Risk and Information Systems Control - Question211; ISACA Certified in Risk and Information Systems Control (CRISC) Certification Exam Question and Answers, question 211.

The percentage of relevant threats mitigated is the best key control indicator (KCI) to determine the effectiveness of an intrusion prevention system (IPS), because it measures how well the IPS is performing its intended function of preventing unauthorized access or attacks. The percentage of system uptime is not a good KCI, because it does not reflect the quality or accuracy of the IPS. The total number of threats identified is not a good KCI, because it does not indicate how many of those threats were actually prevented by the IPS. The reaction time of the system to threats is not a good KCI, because it does not measure the impact or severity of the threats that were prevented or not prevented by the IPS. References = CRISC: Certified in Risk & Information Systems Control Sample Questions2

Following a significant change to a business process, the risk practitioner should advise the risk owner to first conduct a risk analysis to evaluate the current level of risk exposure and compare it with the previous level.
This will help to verify whether the change has indeed reduced the risk, and by how much. The risk analysis will also help to identify any new or residual risks that may have emerged as a result of the change. The other options are not the first actions to take, but rather the subsequent steps after conducting a risk analysis.
Reviewing the key risk indicators, updating the risk register, and reallocating risk response resources are all important activities, but they depend on the outcome of the risk analysis. References = CRISC EXAM TOPIC
2 LONG; CRISC Q&A Domain 1; Managing Change Risk - Oliver Wyman

A maturity model is a tool that assesses the level of development and performance of key processes within an organization. A maturity model typically defines a set of criteria, standards, and best practices for each process, and assigns a rating or score based on the degree of compliance or achievement. A maturity model can help compare the current state of key processes to their desired state, by identifying the strengths, weaknesses, gaps, and opportunities for improvement. A maturity model can also help establish a roadmap for process improvement, by setting realistic and measurable goals and objectives, and monitoring the progress and results. References = Risk and Information Systems Control Study Manual, Chapter 1: IT Risk Identification, Section 1.4: IT Risk Scenarios, p. 49-50.

A key performance indicator (KPI) is a metric that reflects how well an organization is achieving its goals and objectives. A KPI should be specific, measurable, achievable, relevant, and time-bound. For an IT department that has organized training sessions to improve user awareness of organizational information security policies, the best KPI to reflect the effectiveness of the training is the percentage of staff members who complete the training with a passing score. This KPI measures the level of knowledge and understanding of the security policies among the staff members, as well as the quality and impact of the training sessions. It also indicates whether the training sessions have met the predefined criteria and standards for success. A high percentage of staff members who complete the training with a passing score implies that the training sessions have been effective in improving user awareness of organizational information security policies. References = Risk and Information Systems Control Study Manual, Chapter 3, Section 3.3.2, p. 117-118