A controller for managing data demand to and from an asset is described. In particular, the controller is configured to obtain streams of local data from one or more local data sources, said local data providing local information of a current condition of the asset. Once received, the controller determines one or more potential future conditions of the asset based on the current condition of the asset and on changes in the local data. A bandwidth requirement is then determined to obtain streams of remote data from one or more remote data sources potentially relevant to the one or more potential future conditions. This bandwidth requirement is then compared to an available bandwidth; and a priority order determined for obtaining the remote data if the available bandwidth is below the bandwidth requirement.