A method and score management node for supporting service evaluation of a service delivered by means of a telecommunication network. The score management node receives network measurements (v) related to at least one service event when the service is delivered to the user, and calculates a quality score Q for each received network measurement by applying a predefined scoring algorithm Q(v) on the network measurement. After identifying, among the calculated quality scores, quality scores Q which are related to a specific service session experienced by the user, the score management node determines a total session-specific quality score for the specific service session based on the identified quality scores Q. The determined total session-specific quality score can then be used for evaluation of the delivered service.