Sev1 / Sev2

ITIL

Severity levels for incidents. Sev1 is usually a full outage or critical business impact with all-hands response and an executive communication path; Sev2 is a major degradation with a defined workaround or partial impact. Definitions vary by organisation, but Sev1 and Sev2 are typically the incidents for which a written RCA is mandatory and often contractually owed.