Explanation
The Machine Utilization report in the Machine Details page shows the CPU, memory, disk, and network usage of the selected machine over time1. This can help the Citrix Administrator identify any resource bottlenecks or spikes that may affect the performance of the applications launched from the published desktop session. The other reports do not provide information about the machine's resource utilization, but rather about the user's connection, session, and application launch failures2.
1: Machine utilization | Director - Citrix Product Documentation 2: Troubleshoot user issues | Director - Citrix Product Documentation