Vendor evaluation automatic or manual

In AX 2012 ,  we need to setup the vendor evaluation criteria  groups ,  criteria and same attach to Procurement categories to use Vendor evaluation functionality . Generally companies will use the  values like good , Excellent , poor  . My question is   does system will fill the values automatically based on the past transactions ( Late material delivery , reject the materials and purchase return orders or user has to fill manually in the rating on vendor evaluation criteria form  against the criterion group ?