An apparatus is disclosed, the apparatus comprising means for assigning a plurality of user devices, flows and/or data bearers to a network slice of a plurality of network slices, determining whether transmissions via the network slice satisfy a target and, based on determining whether transmissions via the network slice satisfy the target, adjusting a weighted resource allocation metric associated with each user device, flow and/or data bearer of said network slice using one or more calculated offsets, the offsets being calculated so that respective weights, associated with each user device, flow or data bearer on said network slice, are adjusted such that their resource allocations are substantially proportional to their associated weight. The apparatus means may also allocate to the user devices, flows and/or data bearers, based on their respective adjusted weighted resource allocation metrics, transmission resources of the network.