It would be easyer in italian :D btw.

Based on the otrs file in /etc/init.d and in /etc/sysconfig for redhats like system it is used to check if required services are running and to populate cron table 

the services that are checked are:

# if one of this is false, it will not be checked at the startup!
# Note: (may be the database isn't on the same host! --> DB_RUNNING=0) 
OTRS_DB_RUNNING=1
OTRS_HTTP_RUNNING=1
OTRS_CRON_RUNNING=1

After that, it is furthermore essential if you need otrs to fetch email from a pop/imap account "automagically" 

What are the other scheduled functions that are running ?