What would be the best way to have our customers view reports based on Response and Resolution SLAs for their tickets?

As of now, only Supervisors and Admins will be able to access the reporting suite. Customers could generate manual reports using the 'Export' tab option on the ticketing section of the customer portal. 

This report will contain the basic ticket parameters like ticket ID, status, description, etc. as well as the fields that are selectively displayed to the customers.