1. 1 Commercial Operations Sub-Committee Update to TAC October 5, 2007

2. 2 Data Extract Working Group (DEWG) DEWG Met on 7/30; 8/27; & 9/24 Reviewed staff response to extract issues –Identified root cause of extract posting issues and corrective actions implemented by ERCOT Staff. Extracts Service Level Agreement (SLA) –Focus on developing a SLA document to address: Timeliness / Completeness / Accuracy / Availability –Established 3 priority levels for reports/extracts –Extract & Report Information Guide Matrix Identifying Extract or Report; Definition; Purpose; SLA Priority; etc.

3. 3 DEWG Continued SCR 727 ESIID Service History & Usage Extract Re-Baseline Summary –PR50024_01 SCR727 Phase II (SCR 740) is in “Closing” status. –Once the Re-Baseline web service is in production, the current SCR 727 Historical Data Request process will be discontinued (Data files back to 2003) What is the minimal amount of service history and usage data for ESIIDs owned by MP needed? (Today MPs have service history and usage for ESIIDs they own from 7/31/2001 to current.) Consensus of DEWG was to have staff provide an analysis of feasibility and cost to maintain 24 months Service History and Usage Extracts.

4. 4 Settlements and Data Acquisition Working Group (SDAWG) Nodal Impacts Reviewing Commercial Operations Data Extract Changes (DAM; CRR; RTM) Settlement Calendar Load, Generation, and Settlements and Billing Extracts Small Generation – Settlement Issues (RMS) HB 3693 – Sections 24 & 26

5. 5 COPS Communication Working Group ( CCWG) Review of Notification Process –Working as planned –No need for changes at this time Completed final review of COPMGRR005, creating “Section 11, Extracts and Reports” –Impact Analysis – No System Impact

6. 6 Voting Item CCWG submitted to COPS and COPS recommends to TAC approval of COPMGRR005 “Market guide revision Creating Section 11, Extracts and Reports VOTE

7. 7 Profile Working Group (PWG)

8. 8 Annual Validation Update – On schedule Round 2 – Load research sample meters –Installations to be completed by 6/30/08 –25 % of Round 2 sample have IDRs installed DLC and Demand Response Update –Submitted PRR 736 to PRS (PRS tabled until implementation issues are resolved) –PWG to work directly with “Texas Set” to resolve implementation issues.

9. 9 Voting Item PWG submitted to COPS and COPS recommends to TAC approval of LPGRR025 Model Spreadsheets for Flat Load Profile Types VOTE http://www.ercot.com/mktrules/issues/lpgrr/025-049/025/index.html

10. 10 Voting Item PWG submitted to COPS and COPS recommends to TAC approval of LPGRR023 Removal of Gray-Highlighted Text VOTE http://www.ercot.com/mktrules/issues/lpgrr/000-024/023/index.html

11. 11 PRR720 TRE Fee Methodology Following Discussion and review, COPS set up an Ad Hoc Committee to work with Staff to: –Simplify the calculation of TREF and billing. –Have personnel other than Settlements perform the billing and segregate TRE activity from ISP Protocols. –Implement the change in process with the least intrusion to existing processes. –Develop a process for reconciling TRE costs vs TREF collections. –ERCOT Legal, ISO, and TRE Staff, are involved in the discussions with COPS Ad Hoc members – Process is proceeding as we resolve and clarify issues.

12. 12 PRR720 TRE Fee Methodology Following Discussion and review, COPS set up an Ad Hoc Committee to work with Staff to: –Simplify the calculation of TREF and billing. –Have personnel other than Settlements perform the billing and segregate TRE activity from ISP Protocols. –Implement the change in process with the least intrusion to existing processes. –Develop a process for reconciling TRE costs vs TREF collections. –ERCOT Legal, ISO, and TRE Staff, are involved in the discussions with COPS Ad Hoc members – Process is proceeding as we resolve and clarify issues.

13. 13 Questions ?