> For the complete documentation index, see [llms.txt](https://docs.alemba.com/asm-gaia-10.4/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.alemba.com/asm-gaia-10.4/use-asm/using-asm-core/managing-your-cmdb/allocating-change-windows-to-cmdb-items.md).

# Allocating Change Windows to CMDB Items

Change Windows are time periods during which changes to CMDB items linked to a request can be scheduled.

Each Change Window is part of a Change Calendar that is defined when the Change Calendar is created.  The Change manager or System Administrator will [create the change calendars](/asm-gaia-10.4/use-asm/using-asm-core/requests-and-tasks/managing-change-calendars.md).

**To link CMDB items to a Change Window**, use the Change Windows Explorer option on the **Request Details** window.

<figure><img src="https://content.gitbook.com/content/xP0IZ1PKDWM22PFPFi0l/blobs/fO3SkP39JIqnHIFpWtb8/image.png" alt=""><figcaption></figcaption></figure>

1. Click **Change Windows**
2. Click **Add New**, and select the change window you would like to use.
3. Save the changes