In the registation of this trait a scale of 1 to 3 is used, where 1 is easy, 2 is average and 3 is uneasy.
The assessment and reporting must take place at least 30 days after calving. This is for the cow to get used to being milked. In addition, udder edema can cause discomfort and make the cow restless when milking. Because of this it is an advantage to wait a few weeks after calving to assess the temperament.
In addition to the fact that temperament is emphasized in the breeding goal, there is an indirect selection for temperament for both cows and bulls. This happens at the individual farms and at the bull stations by slaughtering animals with a bad temper.