What information does the value category provide in the maintenance order?

In Customizing, to what data must you assign digital signatures in addition to the order type?

Your customer wants to create a component for maintenance that does not allow physical inventory.
Which material type must you use?

In order type Customizing, you can set the default for when the purchase requisition is created to immediately, from release, or never. For which combination must you set the default?
Please choose the correct answer.
Response:

What do you use to set up a refurbishment order for external refurbishment?
Please choose the correct answer.
Response: