Suppliers are stored in the customer list. Call up the customer list via the navigation bar Customers and search for the relevant supplier using the search function (see instructions LINK_TO_PAGE=15).
Select the supplier to be evaluated and click on Evaluation at the top of the bar.

Then you can Assign a new rating. To do this, select a rating criterion and assign the rating from 5 levels (or 3 levels if your company works with only 3 levels). You can also add a note.

After Saving (or Save & continue to the next criterion), this rating now appears in the customer detail view with the color markings red (bad), yellow (medium) and green (good).