Giuliano, no problem asking simple questions.
Ariba Analysis does support scheduling reports to run in background. There's also an option to have your background report emailed to the user that scheduled the report or any others you wish to receive the report.
Reference the Running Analytical Reports guide from Help@Ariba for additional information on using the background report feature.
Good luck and don't hesitate to let us know if you have additional questions.
Manny Cortez
Ariba Product Management