In RIIO-1 Network Output Measures (NOMs) were the mechanisms that provide a means to monitor and assess the network asset management outcomes that network companies deliver. They represent the service delivery resulting from companies’ asset interventions, and can be considered as a forward-looking indicator of network performance. In RIIO-1, these primarily cover specified asset replacement/refurbishment activities.
We are seeking views on our assessment of network companies’ performance in delivering their NOMs outputs during RIIO-1 as well as the proposed funding adjustments and rewards/penalties due under the NOMs Incentive Mechanism. The process for determining these is set out in the Network Output Measures (NOMs) Incentive Methodology. The assessment has been conducted for the three sectors whose RIIO-1 price controls ran for the period 1 April 2013 - 31 March 2021, i.e. Gas Distribution, Gas Transmission and Electricity Transmission.