A network entity for controlling an end-to-end service, the end to end service is provided across an operator network domain which is managed by a network operator and a service provider domain which is managed by a third party service provider and managed independently from the operator network domain, the network entity is part of the operator network domain; characterized in that the network entity is configured to: determine an adjustment for a network slice instance (132, 134) in the operator network domain based on performance indicator data of the service provider domain and requirements of the end-to-end service, the performance indicator data of the service provider domain being real-time performance indicator data of the end-to-end service in the service provider domain, send an instruction to adjust the network slice instance (132, 134) in accordance with the determined adjustment, wherein the network entity is configured to: determine the adjustment for the network slice instance (132, 134) also based on performance indicator data of the operator network domain, the performance indicator data of the operator network domain being real-time performance indicator data of the end-to-end service in the operator network domain, wherein the network entity is further configured to: synchronize the performance indicator data of the operator network domain and the performance indicator data of the service provider domain; and determine the adjustment for the network slice instance (132, 134) based on the synchronized performance indicator data of the service provider domain and based on the synchronized performance indicator data of the operator network domain. the network entity is part of the operator network domain; characterized in that the network entity is configured to: determine an adjustment for a network slice instance (132, 134) in the operator network domain based on performance indicator data of the service provider domain and requirements of the end-to-end service, the performance indicator data of the service provider domain being real-time performance indicator data of the end-to-end service in the service provider domain, send an instruction to adjust the network slice instance (132, 134) in accordance with the determined adjustment, wherein the network entity is configured to: determine the adjustment for the network slice instance (132, 134) also based on performance indicator data of the operator network domain, the performance indicator data of the operator network domain being real-time performance indicator data of the end-to-end service in the operator network domain, wherein the network entity is further configured to: synchronize the performance indicator data of the operator network domain and the performance indicator data of the service provider domain; and determine the adjustment for the network slice instance (132, 134) based on the synchronized performance indicator data of the service provider domain and based on the synchronized performance indicator data of the operator network domain. determine an adjustment for a network slice instance (132, 134) in the operator network domain based on performance indicator data of the service provider domain and requirements of the end-to-end service, the performance indicator data of the service provider domain being real-time performance indicator data of the end-to-end service in the service provider domain, send an instruction to adjust the network slice instance (132, 134) in accordance with the determined adjustment, wherein the network entity is configured to: determine the adjustment for the network slice instance (132, 134) also based on performance indicator data of the operator network domain, the performance indicator data of the operator network domain being real-time performance indicator data of the end-to-end service in the operator network domain, wherein the network entity is further configured to: synchronize the performance indicator data of the operator network domain and the performance indicator data of the service provider domain; and determine the adjustment for the network slice instance (132, 134) based on the synchronized performance indicator data of the service provider domain and based on the synchronized performance indicator data of the operator network domain. determine the adjustment for the network slice instance (132, 134) also based on performance indicator data of the operator network domain, the performance indicator data of the operator network domain being real-time performance indicator data of the end-to-end service in the operator network domain, wherein the network entity is further configured to: synchronize the performance indicator data of the operator network domain and the performance indicator data of the service provider domain; and determine the adjustment for the network slice instance (132, 134) based on the synchronized performance indicator data of the service provider domain and based on the synchronized performance indicator data of the operator network domain. synchronize the performance indicator data of the operator network domain and the performance indicator data of the service provider domain; and determine the adjustment for the network slice instance (132, 134) based on the synchronized performance indicator data of the service provider domain and based on the synchronized performance indicator data of the operator network domain.