A maintenance window is a predefined period of time during which planned changes or updates can be performed on a system or network with minimal impact on the users or business operations1. A project manager should consider the maintenance window next when deploying a new networking device into an existing production environment, as it will help to reduce the risk of downtime, disruption, or errors. A maintenance window should be scheduled in advance, communicated to the stakeholders, and aligned with the change management plan2.