Design Notes and Interim Approaches »

Design Notes and Interim Approaches

Design Notes detail specific areas of interest, be it processes, procedures, activities or events, where industry have requested further guidance to aid their understanding. This page hosts all current Smart Metering Implementation Programme Design Notes.

Design Notes were previously commissioned and approved by the Transitional Business Design Group (TBDG). Earlier this year the responsibility to maintain the Design Notes transitioned to the Technical Architecture and Business Architecture Sub-Committee, a SEC Sub-Committee.

Whilst the content of Design Notes were subject to peer review and considered to be accurate at the time of their publication, changes may have since taken place that mean this is no longer the case. In any event, Design Notes should be considered to contain non-binding clarifications on the topic identified. In the event of any conflict or inconsistency between any Design Note and any relevant license conditions, the SEC or any other relevant regulation, the relevant license conditions, SEC and/or other relevant regulation shall take precedence over the Design Note.

As part of the June and July 2017 TABASC meetings, an approach was agreed for undertaking the review of the nine Design Notes that sit under the TABASC ownership, following formal handover from BEIS and the transitional Technical and Business Design Group (TBDG). This review is underway, if you have any comments on these Design Notes, please contact SECAS with your suggestions.

The table below provides a summary of all currently commissioned Design Notes:

Design NoteDescriptionStatusLink
Auxiliary Load Control Switches (ALCS)Describes how to commission and set schedules on ALCS, as well as providing Change of Supplier scenarios for ALCSReleased Design Note - ALCS v1.1
Change of SupplierChange of Supplier Describes the Service Requests involved in Change of Supplier eventsReleased Design Note - Change of Supplier v1.1
Install and CommissionDescribes how to install and commission smart metering equipmentReleased Design Note - Install and Commission v1.1
Prepayment (Change of Supplier)Describes the Service Requests and their usage in relation to Change of Supplier in prepayment scenariosReleased Design Note - Prepayment Change of Supplier v1.0
Communications Hub ExchangeDescribes the process to be followed in premises and the Service Requests involved in the exchange of a Communications HubReleased Design Note - Communications Hub Exchange v1.1
Communications Hub Re-useDescribes the process to be followed in premises and the Service Requests involved in the exchange of a Communications Hub - This Design Note has been unpublished following a significant discrepancy with SEC Section F8.6UnpublishedNone
Time ManagementSummarises how time is provided to and manage on Smart Metering Devices according to the requirements laid out in the SEC, DUIS, SMETS, CHTS and GBCS.Released Design Note - Time Management v1.1
Reactive Install and Leave (No Wireless Area Network)Describes how to reactive install and leave smart metering equipment in events where there is temporarily no WANReleased Design Note - Reactive Install and Leave v1.1
Firmware ManagementDescribes the mechanisms for the management of firmware Released Design Note - Firmware Management v1.1

The table below provides a summary of guidance documents and interim settings, including the DCC User Gateway Interface Design Specification (DUGIDS) (available on this page under the Guidance Information Document list):

Guidance InformationDescriptionLink
Uncontrolled Gas Flow Rate - recommendationsThis document provides the UGFR recommended settings at manufacture. These settings were discussed at the transitional Technical Specification Issue Resolution Sub-group (TSIRS) Uncontrolled Gas Flow Rate Recommendations v2.0
DCC Guidance Note
Use of DUIS
DCC has identified a series of behaviours regarding the use of the DUIS that Users should be aware of. These are explained in this guidance note to ensure that all SEC parties and RDPs (Registration Data Providers) are aware of the issue and its implications DCC Guidance - Use of DUIS - v2.13
DCC Retry and Timeout ConfigurationThis Guidance Note provides the current settings for DCC Retry and Timeout configuration in the UIT and Production environments. This information should be read in conjunction with the DCC Guidance Note for Use of DUIS Retry and Timeout Guidance, which contains details of how this configuration is used.
DCC Guidance - Retry and Timeout Configuration v1.10
DCC User Gateway Interface Design Specification (DUGIDS)The purpose of the DCC User Gateway Interface Design Specification documentation is to define the DCC User Interface at a technical level to enable DCC Service Users to integrate their IT infrastructure with the DCC Data Systems. This M2M interface enables suitably authorised DCC Service Users to call Service Requests to interact with Devices and services within the DCC, and to receive responses to those requests as well as Device and DCC Alerts. DCC User Gateway Interface Design Specification - Operational November 2019 v3.1a
Standard Electricity Distributor Configuration SettingsElectricity Distributors have jointly agreed the settings they require to be configured on each ESME by the time it is Commissioned (the 'NP Configurable Data Items'). Those settings are specified in the Engineering Recommendation M30. Standard Electricity Distributor Configuration Settings Guidance Document
Firmware Distribution to Suppliers for SMETS2+ Meters GuidanceThis paper is looking to recommend a standard way of delivering firmware to Suppliers to allow deployment to meters by the most elegant process possible. Firmware Distribution to Suppliers for SMETS2+ Meters Guidance v1.0