Most alerts do not deserve a phone call at night. The disk is at seventy percent, a retry succeeded, a dashboard is an hour stale. It Can Wait Until Morning is the discipline of routing by severity: page for what hurts customers now, send a message for what can be fixed at nine, and delete what never led to an action.

Review the noise monthly. For every alert, ask who acted on it and what they did. If the honest answer is nobody and nothing, the alert is training the team to ignore the next one, which might be real.