IT organizations of large companies are faced with 5 critical and about 80 less critical Alarm messages daily. These are many minor and a few but central IT malfunctions. The latter ones may be business-critical, e.g. the outage of an online banking service. The current Gartner Hype Cycle ITSM, 2020, that annually presents the most important developments and tools on the IT Service Management (ITSM) market, underlines the increasing importance of IT Service Alerting (ITSA). Pertaining tools are linked to ITSM systems and monitoring applications in order to distribute and manage alarm notifications to their receivers automatically. The term coined by Gartner focusses on IT service. However, the term IT Alarm Management is more common in Europe.