To use this module, you need to:

* Go to *Invoicing > Vendor > Bills* and create a new one with any product with the "Can be Maintenance" field checked.
* Confirm the invoice.
* A new equipment category linked to the product line has been created (if the product category did not already have one linked).
* A smart-button is displayed with the equipments created (as many equipments as the quantity of product lines are created).
