Reviewing input and output control reports to verify the accuracy of the system decisions is the most important procedure for the IS auditor to perform during the post-implementation review of intelligent-agent software for granting loans to customers, because it can help identify any errors or anomalies in the system logic or data that may affect the quality and reliability of the system outcomes. Reviewing systemand error logs, signed approvals, and systemdocumentation are also important procedures, but they are not as critical as verifying the accuracy of the system decisions. References: CISA Review Manual (Digital Version), Chapter 4, Section 4.2.21