There are several ways to assign work orders in the system. Some are 'automatic' some are manual. Here is a fairly comprehensive list:

Manual methods

Assigning from the Work order, one at a time

Assigning from the Assignment tool

Start by opening the main menu

Start by clicking on the main menu button on the left panel, top left portion.

If the menu button isn't visible, you are likely on a screen too narrow to see everything, press on the left pointing gold button to take you so you can see the menu button.

Once you are there

Auto methods

From the Assignment Rules

Start by opening the main menu

Start by clicking on the main menu button on the left panel, top left portion.

If the menu button isn't visible, you are likely on a screen too narrow to see everything, press on the left pointing gold button to take you so you can see the menu button.

Once you are there

Events and Actions.

When possible, see if the Assignment rules can do it. It has some features that essentially are Events and Actions but are optimized to make it easier for you to set up auto assignments

You can trigger a WO create by watching for some event, creating of a work order, changing of an asset, setting of a UDF value in a work order (or asset),

Start by opening the main menu

Start by clicking on the main menu button on the left panel, top left portion.

If the menu button isn't visible, you are likely on a screen too narrow to see everything, press on the left pointing gold button to take you so you can see the menu button.

From the API

an optional package that gives you ability to control the EAM/CMMS data through an extensive API in REST or GraphQL

From the DataHub

an optional package that lets you read data from files created by an external source

Indirectly through Automations such as PMs and PdMs

While you might think of these as doing assignments, in and of themselves they often create Work Orders, and it is the nature of the Work order that might result in an assignment being automatically done, the Automations that create Work Orders from PMs etc.., don't in and of themselves do any assigning.