1. MODPO Project Update Overview of December Implementations & EDW Changes Commercial Operations Subcommittee December 11, 2006

2. December 11, 2006 2 Previous Project Migrations Completed Last Month – November 1.PR 40042_06, Lodestar Extracts ODS Migration –MO portfolio; in Closing phase –2006 Budget Range: $100k–$500k –ERCOT project to migrate the Generation, Load, Settlements & Billing, and Shadow Pricing extracts from the Data Archive to the ODS (Operational Data Store) 2.PR 30026, EPS Meter Data –MO portfolio; in Closing phase –2006 Budget Range: <$100k –Market project (PRR283/PIP204) to provide Resource ID data to Market Participant owners via extract Page 2

3. December 11, 2006 3 Recent Project Migrations Completed Last Weekend – Dec 8–Dec 10 1.PR 50059, EIS Siebel Transition –RO portfolio Phase 1 – Infrastructure: in Execution/Production Monitoring –12/9/07 migrate to prod Phase 2 – Extracts: in Execution –2/1/07 migrate to prod; 2/20/07 market go-live –2006 Budget Range: $500k–$1M –Builds relevant ODS Siebel infrastructure, then transitions extracts. Also positions Data Archive components for retirement 2.PR 50060, EDW EIF Transition –RO portfolio; Execution phase (Production monitoring) 12/9/07 migrate to prod –2006 Budget Range: $100k–$500k –Builds relevant TCH ODS infrastructure within Siebel and EIF (Enterprise Integrated Framework). Also positions Data Archive components for retirement Page 3

4. December 11, 2006 4 Recent Project Migrations Completed Last Weekend – Dec 8–Dec 10 3.PR 50030, EIS Lodestar Transition to ODS –MO portfolio; in Execution phase (Production monitoring) 12/9/07 migrate to prod –2006 Budget Range: $100k–$500k –ERCOT project to transition internal LodeStar reports the new ODS 4.PR 40007, SCR 727, Phase II –MO portfolio; in Execution phase (Production monitoring) 12/9/06 migrate to prod; 01/2007 market go-live –2006 Budget Range: $100k - $500k –ERCOT project to transition SCR 727 Extract to the Lodestar ODS 5.PR 50025, Enhance ESIID Lookup Function (PRR312) –MO Portfolio; Execution (Production monitoring) 12/9/07 migrate to prod –2006 Budget Range: $100k-$500k –Market project to provide additional data to include Station ID, Power Region, Premise Type, & Status. Also, advise if pending MVI/MVO Page 4

5. December 11, 2006 5 Recent Project Migrations Completed Last Weekend – Dec 8–Dec 10 6.PR 50121_07, Retail Business Processes –RO portfolio; Execution phase (Production monitoring) 12/9/07 migrate to prod –2006 Budget Range: $1M–$3M –ERCOT project to replace EAI technology with TIBCO solution within the Retail transaction processes 7.PR 50121_08, Endpoint Services, Phase II –RO portfolio; Execution phase (Production monitoring) 12/9/07 migrate to prod –2006 Budget Range: $100k - $500k –ERCOT project to replace EAI technology with TIBCO solution within specific non-transaction processes: Generate Invoice – Lodestar to PaperFree ERCOT Read Load – 867_03- Lodestar to PaperFree Page 5

6. December 11, 2006 6 Future Project Migrations Production Launch in February 2007 1.PR 50024_01, Enhancements to SCR727, Phase I –MO Portfolio; in Execution 2/1/07 migrate to prod (Dec release delayed to February due to open ITEST defects); 2/19/07 market go-live –2006 Budget Range: $500k-$1M; 2007 carry-over TBD –Market project (SCR 740) to provide Market Participants access to SCR 727 ESIID level data in ERCOT systems via Web Services 2.50024_02, Enhancements to SCR 727, Phase II –MO Portfolio; in Execution 2/1/07 migrate to prod (Dec release delayed to February due to open ITEST defects) –2006 Budget Range: $100k-$500k; 2007 carry-over TBD –Additional sub-projects identified by ERCOT to purchase and implement necessary hardware required by users of the EIS environment Page 6

7. December 11, 2006 7 Future Project Migrations Production Launch Dates TBD 3.PR 50061, EDW EAI Transition (inc. PaperFree & NAESB) –RO Portfolio; in Initiation –2007 Budget Range: $250k - $500k –Transition of EAI reporting from Data Archive to Enterprise Data Warehouse 4.50088, ETS (ESIID Tracking System) Transition to EDW –RO Portfolio; in Initiation –2007 Budget Range: $500k-$1M –Transition of ETS reporting from Data Archive to Enterprise Data Warehouse Page 7

8. December 11, 2006 8 Project Needing COPS Action During 2007 PPL planning and approval process, COPS was directed by PRS to review the need for these 2 projects 1.PR 60083, Extension of Credit Against OOM Start Up (PRR 598) MO Portfolio; not started –2007 Priority: 1 - Critical / Rank: 8 (highest ranking “new” project) –2007 Budget Range: $50k - $100k Question: is project necessary given ERCOT performance of manual steps to meet requirements and their continued support of manual solution? 2.PR 40057, URC for Uncontrollable Resources (PRR 427) MO Portfolio; not started –2007 Priority: 3 - High/Medium / Rank: 17 (under “resource capability line”) –2007 Budget Range: $50k-$100k Question: is project necessary given NODAL planned changes and timeline? Next steps? Page 8

9. December 11, 2006 9 Questions / Contacts Adam D. Martinez Mgr, MO DPO ERCOT (512) 248-3883 amartinez@ercot.com Page 9