Which key performance indicator might an internal auditor track?

Tracking the time taken to resolve audit findings is essential for internal auditors because it directly reflects the effectiveness and efficiency of the audit process. This key performance indicator provides insights into the responsiveness of the organization in addressing issues identified during audits. A shorter resolution time may indicate a proactive approach to risk management and compliance, demonstrating the credit union's commitment to maintaining robust internal controls. Additionally, monitoring this metric can help identify patterns or areas where improvements are needed, allowing for better resource allocation and enhanced audit processes in the future.

The other options, while also valuable performance indicators in their own rights, may not specifically align with the core responsibilities and focus areas of an internal auditor. For instance, tracking the number of member applications offers insights into operational performance but does not relate directly to the auditing process. Similarly, member satisfaction ratings and cost reduction percentages are important metrics for overall organizational success but do not provide a direct measure of the audit function's effectiveness or timeliness in addressing findings.