Pleasse follow below instruction
Click "Report" -> "Add Scheduled Report"
Fill in the "Template Name" by click "Select".
Through the new window tick "Performance View Summary Report"
Select the "Report File Format" with MSExcel,PDF,CSV or MSExcel-(Data-only)
Also tick below option:
Begin Time
End Time
Index--------------You can choose CPU,Memory,Device Unreachability Proportion% and so on
Performance View--From here you can choose the "Parameter Value" you have.
If you don't have any Parameter, then you can create them by "Resource"->"Performance View" , then add it.
That's all, hope you can understand my explaination.
Good luck!