I don't have ITSM setup at the moment, but my thinking is during the 2.3 of System Monitoring to trigger an incident when a alert is triggered, based on metrics/thresholds for that template. At which point ITSM BW reporting should work for pulling up the alerts for a particular month; Raul Mata doesn't have to use the ITSM for service calls so the tickets may need to be mass closed at some point, but it should be a way to collect the information they are looking to obtain.