A method for migrating a plurality of communications services in a data communication network in parallel, comprising: accessing a migration map identifying for the plurality of communications services in the data communication network pre-migration and post-migration routes of services through the communications network ; identifying a communications dependency between a first service and a second service in the plurality of communications services according to the migration map , where the pre-migration route for the first service at least partially overlaps with the post-migration route for the second service; constructing , based on the identified communications dependency, a communications dependency graph corresponding to the migration map, the communications dependency graph comprising a plurality of vertices, each of the plurality of vertices corresponding to a pre-migration configuration and a post-migration configuration of a service in the data communication network , wherein a directed edge from a first vertex to a second vertex in the communications dependency graph is created if the pre-migration route of a service associated with the first vertex overlaps with the final post-migration route of a service associated with the second vertex; and migrating the plurality of communications services from their pre-migration configurations to their post migration configurations according to the communications dependency graph, characterized by further comprising: identifying one or more vertices in the communications dependency graph, wherein each of the identified one or more vertices has no in-going edge; and performing migrations for communications services corresponding to the identified one or more vertices in parallel. accessing a migration map identifying for the plurality of communications services in the data communication network pre-migration and post-migration routes of services through the communications network ; identifying a communications dependency between a first service and a second service in the plurality of communications services according to the migration map , where the pre-migration route for the first service at least partially overlaps with the post-migration route for the second service; constructing , based on the identified communications dependency, a communications dependency graph corresponding to the migration map, the communications dependency graph comprising a plurality of vertices, each of the plurality of vertices corresponding to a pre-migration configuration and a post-migration configuration of a service in the data communication network , wherein a directed edge from a first vertex to a second vertex in the communications dependency graph is created if the pre-migration route of a service associated with the first vertex overlaps with the final post-migration route of a service associated with the second vertex; and migrating the plurality of communications services from their pre-migration configurations to their post migration configurations according to the communications dependency graph, characterized by further comprising: identifying one or more vertices in the communications dependency graph, wherein each of the identified one or more vertices has no in-going edge; and performing migrations for communications services corresponding to the identified one or more vertices in parallel. identifying one or more vertices in the communications dependency graph, wherein each of the identified one or more vertices has no in-going edge; and performing migrations for communications services corresponding to the identified one or more vertices in parallel. <EOS>