---
title: "Maintenance Window — Definition | FourSight Glossary"
url: https://foursight.cloud/glossary/maintenance-window
description: "A pre-announced period when a service may be unavailable for planned work. Industry norms: 48–72 hours' notice for scheduled maintenance, with start/end…"
lang: en
---

Back to glossary: https://foursight.cloud/glossary

Incidents & On-Call

# Maintenance Window

A pre-announced period when a service may be unavailable for planned work. Industry norms: 48–72 hours' notice for scheduled maintenance, with start/end time and affected components.

Source

- Atlassian Statuspage Docs — Scheduled maintenance (https://support.atlassian.com/statuspage/docs/schedule-maintenance/)

## Related terms

Incident

An unplanned event that disrupts service or threatens to.
https://foursight.cloud/glossary/incident

Severity (SEV-1 to SEV-4)

A standardized scale for how serious an incident is.
https://foursight.cloud/glossary/severity

Incident Commander (IC)

The single person who owns coordination of an incident end-to-end.
https://foursight.cloud/glossary/incident-commander

Tech Lead (during incident)

The engineer actively diagnosing and fixing the problem during an incident.
https://foursight.cloud/glossary/tech-lead

Comms Lead

Owns customer-facing communication during an incident — status page updates, in-product banners, support te…
https://foursight.cloud/glossary/comms-lead

On-Call Rotation

A scheduled rotation of engineers who are responsible for responding to alerts outside business hours.
https://foursight.cloud/glossary/on-call-rotation

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