User Requirements Specification: Estimation of Annual Consumption System

This specification describes the requirements for a system which uses daily profile coefficients determined by the Initial Settlement and Reconciliation Agency (ISRA) system to calculate estimates of annual consumption for individual settlement registers of metering systems.

This process comprises the Estimation of Annual Consumption (EAC/AA) system. The system will be nationally developed as part of risk management and Data Collectors will have the option of using it for calculating Estimates of Annual Consumption, Annualised Advances and Deemed Meter Advances.

The EAC/AA system must work within the defined context of the Trading Arrangements (TA) for the 1998 market, and therefore this specification includes details of the interfaces between the EAC/AA system and the other systems in the TA.

Estimation of Annual Consumption System User Requirements Specifications

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