Inventory scrap missing for basic users
I have an Odoo 10 install with an admin (me), and some users, and they try to manage scrap.
But, they don't have any Scrap button to create a new scrap either in the inventory -> scrap menu, or in the Initial demand tab in Receipt, delivery order, or Internal transfer.
And when I'm log as an admin, I have access to these functionalities.
Is this a bug from Odoo, or something to configure?