1. EIS Overview and Project Updates for DEWG Jackie Ashbaugh ERCOT April 13, 2006

2. 2 Purpose Provide reliable, innovative, centralized, and comprehensive decision support and business intelligence systems to ERCOT, the Market, and the PUCT ERCOT Enterprise Information Services (EIS) Environment

3. 3 Data Archive/Data Warehouse (DA/DW) Architecture – “Old” Source Systems Data ArchiveData Warehouse ETL Extracts ETL  All databases are Oracle  Snapshot based replication using ETL  ETL tool is currently Informatica Lodestar EMMS Siebel PaperFree Business Intelligence Layer Data Archive/Data Warehouse (DA/DW) Architecture – “Old” TCH EAI DA Siebel ODS SEIBEL ODS Lodestar DA Siebel DA EMMS DA TCH DA Retired

4. 4 Source Systems ( ODS ) Operational Data Store Conformed Data Warehouse Extracts Data Delivery Module ( RSS ) Replicated Source Systems SharePlex / DataGuard  All databases are Oracle  Real-time replication using SharePlex / DataGuard  Centralization of code and logic Lodestar EMMS Siebel EAI Lodestar EMMS Siebel EAI Business Intelligence Layer TCH EAI ODS Siebel ODS SEIBEL ODS Lodestar ODS Siebel ODS EMMS ODS TCH ODS Enterprise Information Services (EIS) Architecture – “New”

5. 5 Project Updates PR 30026 EPS Meter Data Extract/Resource ID Extract (Execution – ITEST) - MO PR 40042_06 Lodestar Batch Extracts (Execution – PTEST) - MO PR 40007 SCR727 move from Data Archive to ODS (Execution – ON HOLD) - MO PR 50059_01 EDW Siebel Transition (Initiation) - RO PR 50060_01 EDW TCH Transition (Initiation) -RO PR 50024_01 SCR 740 Enhancements to SCR 727 (Execution – Development) - MO PR 50030 Lodestar DA Decommission (Planning) - MO 2006 Upcoming Projects PR 60004_01 EIS CDW Foundations (IO project with interdependency of RO projects - Initiate 04/2006) - IO PR 50061_01 EDW EAI Transition (Initiate late 06/2006) - RO PR 60005_01 EIS Data Marts I (Initiate Q4 2006) - MO PR 50088 ETS to EIS (Initiate Q4 2006) - RO Project Updates PR 30026 EPS Meter Data Extract/Resource ID Extract (Execution – ITEST) - MO PR 40042_06 Lodestar Batch Extracts (Execution – PTEST) - MO PR 40007 SCR727 move from Data Archive to ODS (Execution – ON HOLD) - MO PR 50059_01 EDW Siebel Transition (Initiation) - RO PR 50060_01 EDW TCH Transition (Initiation) -RO PR 50024_01 SCR 740 Enhancements to SCR 727 (Execution – Development) - MO PR 50030 Lodestar DA Decommission (Planning) - MO 2006 Upcoming Projects PR 60004_01 EIS CDW Foundations (IO project with interdependency of RO projects - Initiate 04/2006) - IO PR 50061_01 EDW EAI Transition (Initiate late 06/2006) - RO PR 60005_01 EIS Data Marts I (Initiate Q4 2006) - MO PR 50088 ETS to EIS (Initiate Q4 2006) - RO Projects 2006 EIS Active & Upcoming RO/MO Projects