The best way to ensure that access remains appropriate for an organization that practices the principle of least privilege is to review user access rights on a regular basis by obtaining an access control matrix and approval from the user's manager. An access control matrix is a table that shows the access rights and permissions of each user or role for each resource or function. An access control matrix helps to verify that the users have the minimum level of access required to perform their duties, and to identify any unauthorized or excessive access rights. Approval from the user's manager helps to confirm that the user's access rights are consistent with their current role and responsibilities, and to authorize any changes or exceptions as needed. References = Risk and Information Systems Control Study Manual, 7th Edition, Chapter 3, Section 3.2.2, page 1281

Section: Volume D

is incorrect. Assuming equal degree of protection would only be rational in the rare
event that all the assets are similar in sensitivity and criticality. Hence this is not practiced in risk
analysis.

The most important consideration when selecting KPIs for control monitoring is that the source information is consistently available, meaning that it can be obtained regularly, reliably, and timely from the same or equivalent data sources. This ensures that the KPIs can measure the performance of the controls over time and across different units or functions, and provide meaningful and comparable results. Source information that is acquired at stable cost, tailored by removing outliers, or readily quantifiable are also desirable, but not as essential as consistency.
References:
*ISACA, Risk IT Framework, 2nd Edition, 2019, p. 751
*ISACA, Performance Measurement Metrics for IT Governance2