System Performance Reports
NIE Networks aims to provide a safe, reliable and responsive electricity service, which meets the standards customers expect.
A primary measure of network performance is the time customers are off supply due to faults on the network. We measure this in terms of Customer Minutes Lost (fault CML), which is the average number of unplanned minutes customers are off supply per annum due to network faults.
Another measure of network performance is the number of times customers are off supply. We measure this as fault Customer Interruptions (CIs), by reference to the number of times customers experience supply interruptions of more than one minute duration per 100 connected customers.
NIE Networks reports annually to the Utility Regulator on network performance.