To view reports, you must have the process_report_admin role.
To view historical reports:
Select one of these:
Tools > Workflow > Historical Report > Process
Tools > Workflow > Historical Report > User
In the General tab, select the duration, and other parameters for which to run the report.
Click Run.
Click the Results tab, to view the report.
To view additional information, click a process, instance, or user.
To save the report so it can be rerun, click Save.