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XRN 5535A
Processing of CSS Switch Requests Received in ‘Time Period 5’

Last Updated
28 Mar 2023
Status
Implemented
Release Type
Ad-hoc
Implementation Date
06 Mar 2023
Proposer Xoserve Impacted DSC service area

Service Area 3 (Current Apr 21)

Manage updates to customer portfolio

Customer Change Team Leader uklink@xoserve.com

Summary

The circumstances where the GRDA receives messages after 02:59:59 should be exceptionally rare – i.e. systems have failed in normal operation; the resilience built into the system to maintain contiguous service have failed such that they cannot be restored within the 1 hour RTO; Target DR Recovery has been missed AND Maximum DR Recovery has also been missed.

Since this change is required in such rare circumstances this change needs to identify a solution that is cost effective to implement so that these Registrations can be recorded in UK Link systems.

The analysis needs to engage stakeholders to determine the risk / impact of the solution to all industry participants.

This change should focus on short term options for implementation.  It is not proposed to initiate a large investment given the extremely low likelihood of this scenario occurring.

Impacted Customer Types

  • IGT
  • NGT
  • Shipper
  • DNO

Documents

Document title Comment Last updated CHMC outcome
Change Proposal Approved 30/01/2023 Approved at ChMC on 13/07/2022
Initial Review Stage not required N/A N/A
DSG Discussion N/A 01/03/2023 N/A
High Level Solution Options Stage not required N/A N/A
Solution Review Stage not required N/A N/A
Detailed Design 3139.5 - VO - PO 13/03/2023 Approved at ChMC 08/03/2023
Evaluation Quotation Reports (EQR) Stage not required N/A N/A
Business Evaluation Reports (BER) Approved 13/02/2023 Approved at ChMC 08/02/2023
Change Completion Reports (CCR) Stage not yet reached N/A N/A

Timeline

Initial Review
Change Proposal Raised 01/07/22
Status Awaiting approval at ChMC
Capture
Approved into Capture 13/07/22
Status ChMC approved into Capture
Solution Consultation
Expected: 00/00/00
Status Stage not required
Awaiting Delivery
Expected: 00/00/00
Status Stage not required
In Delivery
BER approved 08/02/23
Status Detailed Design Change Pack approved at ChMC 08/03/2023
Implemented
Expected: 06/03/23
Status Successfully Implemented

Contact the Change Team

Need to get in touch with a member of the Change Team?

You can email us at: uklink@xoserve.com and we'll get back on the same day between the hours of 9:00am to 4:30pm.