This page provides full details of the proposed change, relevant dates and decisions.
What is the issue?
As part of the Market-wide Half-Hourly Settlement (MHHS), the MHHS Programme (MHHSP) has engaged market participants to ensure the MHHS design is functional. To do this, market participants have needed to demonstrate:
Functional Characteristics of the MHHS Market Interfaces and Services.Non-functional of the MHHS Market Interfaces and Services; and Migration-related characteristics of the MHHS Market Interfaces and Services.
To test the functionality, the MHHS has used Systems Integration Testing (SIT) to test the end-to-end (E2E) MHHS Design, ensuring that the new MHHS arrangements function correctly
What is the proposed solution?
To allow the DIP Manager and Users to develop and test system changes, it is proposed to establish an ongoing system integration testing environment managed by the DIP Manager. This will enable collaboration with the DIP Service Provider and Users to implement changes effectively and minimise disruptions to the DIP systems.
Status
DCR0005 was issued for consultation. The DIP Manager is reviewing responses.
DCR0005 was raised by E.ON on 8 August 2025, and it was presented at DCAB008 for feedback. The DIP Manager has incorporated the feedback received into the enduring solution for DCR0005.
Present revised text to DCAB at a future meeting to ensure additional feedback is provided. This will allow the DIP Manager to understand whether the revised text meets the aim of this DIP CR.
On January 1, 2026, the DIP Manager convened a working group to discuss the processes surrounding system changes, including how they are released and tested. The group also considered whether these processes and others should be outlined in the DIP Rules.
Next steps
| Stage | Date |
|---|---|
| Submission | 08/08/2025 |
| Initial Assessment | 09/09/2025 |
| Workgroup | |
| Consultation | 19/09/2025 |
| Final Assessment | |
| Decision | |
| Implementation |