# Overview

Learn how permissions, document sequences, and units of measure work.

Source: https://support.toolingmetrics.com/en/admin/overview/

- [How the permissions model works](https://support.toolingmetrics.com/en/admin/overview/permissions-model.md): How groups, record types, and permission levels combine to control what each team member can do.
- [Understanding how sequences work](https://support.toolingmetrics.com/en/admin/overview/sequences.md): How a sequence builds the next document number and when its counter advances.
- [How units of measure work](https://support.toolingmetrics.com/en/admin/overview/units-of-measure.md): How the reference unit, conversion ratios, and purchase UOM work together to let you buy in boxes and stock in pieces.