Enroll a representative server in Checkmk and monitor the services that actually matter. Trigger a known failure, such as disk pressure or a stopped process, and check alert timing, context, and escalation. Ask the on-call person whether the notification tells them what to inspect next.
Monitor the monitoring system too: stale agents and missed checks should be visible. Test backup and configuration restore before broad rollout. A useful monitoring platform reduces incident time without flooding operators with nonactionable warnings.
Akousa