change window
also: maintenance window, deployment window
A period of time during which system changes, updates, or maintenance are permitted without disrupting normal operations. Often used in production environments to minimize impact on users.
A change window is a scheduled timeframe when system administrators are allowed to make modifications, apply patches, or perform maintenance on production systems. Changes outside these windows are typically prohibited to ensure stability and availability.
Change windows are commonly used in enterprise environments with change management policies. For example, a company might establish a change window every Sunday from 2-4 AM when fewer users are active, allowing patches to be applied to web servers or databases during low-traffic hours.
The concept helps coordinate updates across teams, provides notification to users, and reduces the risk of unexpected downtime. Many organizations use ticketing systems to request and approve changes before the scheduled window.