Monitoring the Settlement performance standards

Each quarter, the Performance Assurance Board (PAB) agrees the approach to monitoring the Supplier Half Hourly (HH) and Non-Half Hourly (NHH) Settlement performance standards.

Last updated: 1 September 2023

Industry Expectations

All Suppliers below the 97% Non-Half Hourly standard at RF, the 99% Half Hourly Measurement Class C standard at SF and the 99% Half Hourly sub 100kW standard at R1 should be striving to improve performance above these levels and providing updates to their Operational Support Manager (OSM) on the work they are undertaking to do this.

However, Elexon and the PAB’s efforts are predominately focused on Suppliers with the largest volumes of non-compliant estimation above thresholds that are reviewed on a quarterly basis.

At its August 2023 meeting, the PAB agreed the thresholds should be maintained at:

• 850MWh of monthly non-compliant estimation at R1 for Half Hourly (HH) Measurement Class (MC) C
• 850MWh of monthly non-compliant estimation at R1 for HH MCs E and G (combined)
• 1250MWh of monthly non-compliant estimation at RF for Non Half Hourly (NHH) and HH MC F (combined)

‘Non-compliant estimation’ in this case is the estimated volume above 1% of a Supplier’s total volume at R1 (for MC C and MCs E and G) and 3% of total volume at RF (for NHH and MC F).

These thresholds will next be reviewed in November 2023.

In general, Elexon and the PAB intend to reduce the thresholds as industry performance improves.

Error and Failure Resolution (EFR)

Suppliers with volumes of non-compliant energy above the thresholds are likely to enter Error and Failure Resolution (EFR) in accordance with BSCP538.

Suppliers in EFR for Settlement Performance are required to provide forecast improvements for at least the next quarter. The PAB encourages Suppliers to forecast out further where possible.

As with any EFR plan, Suppliers who consistently fail to achieve their forecast improvements may be considered for escalation to the PAB or BSC Panel.

Suppliers will be considered for exit from their EFR plan when they have achieved:

• 425MWh of monthly non-compliant estimation at R1 for Half Hourly (HH) Measurement Class (MC) C
• 425MWh of monthly non-compliant estimation at R1 for HH MCs E and G (combined)
• 625MWh of monthly non-compliant estimation at RF for Non Half Hourly (NHH) and HH MC F (combined)

These thresholds will also be reviewed in November 2023.