Evaluation of the quality of service by comparing the current quality of service and quality of service agreed between the user and the telecommunication network.

Procedure for assessment of the quality of service of a telecommunication network in which it is determined a current quality of service, which is actually available to the user; which method it is characterized in that the telecommunication network and the user agree quality service, which serves as a target, and the evaluation result is calculated by comparing the current quality of service with the quality of service, which is the objective.