Before revision: It results from the fulfillment of his or her expectations with respect to the utility and / or enjoyment of the application or service in the light of the user’s personality and current state.This definition has been adopted in 2016 by the International Telecommunication Union in Recommendation ITU-T P.10 .ITU-T Recommendation P.10 : Vocabulary for performance and quality of service , Amendment 5 (07/16) .
After revision: It results from the fulfillment of his or her expectations with respect to the utility and / or enjoyment of the application or service in the light of the user’s personality and current state.This definition has been adopted in 2016 by the International Telecommunication Union in Recommendation ITU-T P.10 /G.100.Recommendation ITU-T P.10 : Vocabulary for performance , quality of service and quality of experience/G.100 .