Current published material covers network efficiency, distribution heat loss, supply reliability, flow and return temperature, and metering and monitoring. Each needs particular information and tells you something different about the network.
Confirm meter boundaries and periods align before reaching conclusions about plant or distribution performance. A meter inventory shows what can be measured, where data is missing and what may be needed next.
Network performance changes with outside temperature, occupancy, operating hours, weekends, public holidays and the way a building is used. Compare like with like, with the method and source data visible.