Supplier Ratings Question

We have it set up that our translators and reviewers can rate the job. The wording is a little unclear though. If the reviewer is asked to rate the "translation quality" are they rating the translator who did the translation? If so, does that rating show up in the translator's status? It's a bit confusing because the translator is also being asked to rate the "translation quality" so we are asking them to rate themselves? It seems odd. Right now in the settings you can only choose what to rate for all suppliers and it is isn't segmented for translators and/or reviewers. Can you please explain these ratings more?