1. RMS Update to TAC September 4, 2008

2. RMS Update to TAC August 13 RMS Meeting Summary: August 13 RMS Meeting Summary: http://www.ercot.com/calendar/2008/08/20080813-RMSRMS http://www.ercot.com/calendar/2008/08/20080813-RMSRMS Voting Items: Voting Items: RMGRR062, AMIT Requested Change to Letter of Authorization Response (update) RMGRR062, AMIT Requested Change to Letter of Authorization Response (update) RMGRR063, Mass Transition Revisions Resulting from June 2008 Lessons Learned Workshop (vote) RMGRR063, Mass Transition Revisions Resulting from June 2008 Lessons Learned Workshop (vote) RMGRR064, Correcting Retail Market Guide for Leapfrog process to Synch up with ERCOT’s system logic (Vote) RMGRR064, Correcting Retail Market Guide for Leapfrog process to Synch up with ERCOT’s system logic (Vote) SLA Update SLA Update AMIT Update AMIT Update ATF Taskforce ATF Taskforce MARS Task Force MARS Task Force

3. RMS Update to TAC RMGRR062, AMIT Requested Change to Letter of Authorization Response (update) RMGRR062, AMIT Requested Change to Letter of Authorization Response (update) Requested the TDU wires charges information be excluded from the 12 months usage response information Requested the TDU wires charges information be excluded from the 12 months usage response information Due to concerns from multiple market segments about the exclusion, the RMGRR was remanded back to the AMIT for further discussion. Due to concerns from multiple market segments about the exclusion, the RMGRR was remanded back to the AMIT for further discussion.

4. RMS Update to TAC RMGRR063, Mass Transition Revisions Resulting from June 2008 Lessons Learned Workshop (vote) RMGRR063, Mass Transition Revisions Resulting from June 2008 Lessons Learned Workshop (vote) Clarifies processes for Mass Transitions to the POLR Clarifies processes for Mass Transitions to the POLR Improves clarity and consistency of process Improves clarity and consistency of process Potential to reduce time Customer is on POLR Potential to reduce time Customer is on POLR

5. RMS Update to TAC RMGRR064, Correcting Retail Market Guide for Leapfrog process to Synch up with ERCOT’s system logic (Vote) RMGRR064, Correcting Retail Market Guide for Leapfrog process to Synch up with ERCOT’s system logic (Vote) Correcting/updating the RMG’s documented process will allow Market Participants to better manage the appropriate resolution for Inadvertent Gains when a third Competitive Retailer (leapfrog scenario) is involved. Correcting/updating the RMG’s documented process will allow Market Participants to better manage the appropriate resolution for Inadvertent Gains when a third Competitive Retailer (leapfrog scenario) is involved.

6. RMS Update to TAC RMS requests TAC Affirmative Vote on RMS requests TAC Affirmative Vote on RMGRR063, Mass Transition Revisions Resulting from June 2008 Lessons Learned Workshop and, RMGRR063, Mass Transition Revisions Resulting from June 2008 Lessons Learned Workshop and, RMGRR064, Correcting Retail Market Guide for Leapfrog process to Synch up with ERCOT’s system logic RMGRR064, Correcting Retail Market Guide for Leapfrog process to Synch up with ERCOT’s system logicVOTE

7. RMS Update to TAC ERCOT 2009 SLA Update ERCOT 2009 SLA Update Considerations: Considerations: Expanded maintenance windows from 12 to 15 hours on weekend 1 and 2 ( reduced from proposed 18 hrs.) Expanded maintenance windows from 12 to 15 hours on weekend 1 and 2 ( reduced from proposed 18 hrs.) Move Release window from week 2 to week 4 based on less market transaction activity Move Release window from week 2 to week 4 based on less market transaction activity Reduce Outage window form 36 down to 30 hours Reduce Outage window form 36 down to 30 hours 4 months each year have 5 weekends so add a 12 hour maintenance window 4 months each year have 5 weekends so add a 12 hour maintenance window TDTWG to consider in September, RMS will consider in October TDTWG to consider in September, RMS will consider in October

8. RMS Update to TAC Advanced Metering Implementation Team (AMIT) Advanced Metering Implementation Team (AMIT) Settlement Settlement Interim solution to support 15 minute settlement by July 2009 Interim solution to support 15 minute settlement by July 2009 MARS Task Force created to address MARS Task Force created to address Long term consideration Long term consideration ERCOT initiated RFP earlier this summer ERCOT initiated RFP earlier this summer Evaluate use of Central Repository rather than multiple TDU locations and methods of communication. Evaluate use of Central Repository rather than multiple TDU locations and methods of communication. Joint ERCOT and Market Participant selection process Joint ERCOT and Market Participant selection process Web Portal Host (s) Web Portal Host (s) Business Requirements and Use Cases have been Defined Business Requirements and Use Cases have been Defined RFP in development stage RFP in development stage

9. RMS Update to TAC AMIT September Schedule 3 – Project #5 – Retail Market Interface (RMI) Project Wed: 9:30-5:30 Location: ERCOT {7620 Metro Center Dr., Austin, TX 78744} *16-17 – Project #4 – Retail Market Interface (RMI) Tue: 9:30-5:30 Wed: 9:30-5:30 Location: Public Utility Commission, CHR {1701 N. Congress Ave, Austin TX, 78701} 22-23 – Project #5 – Retail Market Interface (RMI) Mon: 9:30-5:30 Tue: 8:30-4:30 Location: ERCOT {7620 Metro Center Dr., Austin, TX 78744} 29-30 – Project #4 – Home Area Network (HAN) Mon: 9:30-5:30 Tue: 8:30-4:30 Location: ERCOT {7620 Metro Center Dr., Austin, TX 78744}

10. RMS Update to TAC Acquisitions Task Force (ATF) Acquisitions Task Force (ATF) ISSUE: No process for transitioning a large number of ESIIDs from one REP to another due to an acquisition. Such a process would allow a REP who is in financial difficulty to sell their ESIIDs to another REP and then quickly transition their Customers to the purchasing REP. This ability could reduce the number of Mass Transitions to POLR experienced by the Market. ISSUE: No process for transitioning a large number of ESIIDs from one REP to another due to an acquisition. Such a process would allow a REP who is in financial difficulty to sell their ESIIDs to another REP and then quickly transition their Customers to the purchasing REP. This ability could reduce the number of Mass Transitions to POLR experienced by the Market. PROPOSED SOLUTION: Develop a process for transitioning large numbers of ESIIDs from one REP to another due to a merger or acquisition by leveraging the existing functionality at ERCOT. PROPOSED SOLUTION: Develop a process for transitioning large numbers of ESIIDs from one REP to another due to a merger or acquisition by leveraging the existing functionality at ERCOT.

11. RMS Update to TAC MARS Task Force MARS Task Force Issues: Issues: Start/Stop time on Move-ins/Move-outs Start/Stop time on Move-ins/Move-outs Billing impacts Billing impacts Settlement and data extract impact Settlement and data extract impact Communication process of 15 minute data from TDSP to ERCOT Communication process of 15 minute data from TDSP to ERCOT DRG with Advanced metering communication, settlement and data extract DRG with Advanced metering communication, settlement and data extract Solution: The Market has an objective to support the AMIT defined interim solution by July1, 2009. ERCOT has indicated time to accomplish of 12-14 months from the date of initiation. The focus inherent with a single objective process team is necessary and requires perspective and involvement of ERCOT as well as both the Retail and Commercial Markets. Solution: The Market has an objective to support the AMIT defined interim solution by July1, 2009. ERCOT has indicated time to accomplish of 12-14 months from the date of initiation. The focus inherent with a single objective process team is necessary and requires perspective and involvement of ERCOT as well as both the Retail and Commercial Markets.

12. RMS Update to TAC On the Agenda for September 10 On the Agenda for September 10 Vice-Chair Election Vice-Chair Election CWG Draft Recommendation for Market Credit Risk Standard Consideration CWG Draft Recommendation for Market Credit Risk Standard Consideration Revision Requests for Retail Market Guide Revision Requests for Retail Market Guide Update to Disconnect and Reconnect for Non-Pay Update to Disconnect and Reconnect for Non-Pay Update to Safety Net Move- In Update to Safety Net Move- In Adjustments to Market Test Plan for 2008-09 Adjustments to Market Test Plan for 2008-09 Review ERCOT 2009 SLA proposal Review ERCOT 2009 SLA proposal Review of ERCOT 2 nd Q2008 Performance Measures Activity Report Review of ERCOT 2 nd Q2008 Performance Measures Activity Report

13. Questions?