This question falls under the Data Analysis domain, focusing on methods to gather data for process improvement. The IT manager needs to review user concerns about wait times, which requires collecting feedback.

Infographic (Option A): An infographic visualizes data but isn’t a method for gathering feedback.

KPI (Option B): KPIs (e.g., average resolution time) measure performance but don’t directly gather user feedback.

Survey (Option C): A survey collects detailed feedback from users about their experiences, such as wait times, making it the best method for this review.

UAT (Option D): User Acceptance Testing validates software functionality, not support processes.

The DA0-002 Data Analysis domain includes "applying the appropriate descriptive statistical methods," and surveys are a standard method for collecting user feedback to analyze and improve processes.