1. Flight V1.4F2 TTPT Update to RMS May 1

2. Participants of Flight V1.4F2 5 CRs 3 New CRs Andeler Constellation UBS Warburg 2 Existing CRs Electric America testing in several new TDSP territories UCE - Existing CR retesting 6 TDSPs AEP Entergy Oncor Reliant Sharyland TNMP ERCOT

3. Overview of Market Testing Flight V1.4F2 First Flight using ERCOT Testing on Demand System Second Flight to test TX SET v1.4 transactions Test plan includes 8 Frames - Scheduled 1 week per frame First Flight for the Texas Market without an ITPTA Scheduled date for completion by all parties - June 10th Flight includes a new End to End script supporting payment - Required by all 6 TDSPs ETOD scripts - Required by all 6 TDSPs End to End scripts - required by Oncor and Reliant TDSP Flight V1.4F2 began 4-15 after being delayed Note: The original start date of this Flight was delayed to enable ITPTA resources to continue supporting Production Market Resolution activities (Tiger Team) without being interrupted by Market Testing activities.

4. Without an ITPTA??? How are we doing this??? All parties involved had to agree to take on additional responsibility TTPT, TTPT Chair, TTPT Vice Chairs, ERCOT Market Testing Team, PUCT, ERCOT Management, Glen Wingerd Immediate Contact Representatives were identified and communicated. In instances where a Testing Participant encountered issues, constraints, obstacles, they were to e-mail and or call contact representative(s) on the Market Testing Contact list for assistance as soon as possible. All parties involved had to agree to manage the Flight as best possible without an ITPTA. If we encountered problems, we would work with Trading Partners involved and alert Larry Grimm to the situation. As of this date, this has not been necessary.

5. What’s our process??? All Market testing Flight information is available on the Retail Market Testing Web- site Conference call agendas are posted for the daily conference call Daily Market Testing conference calls take place each day at 11 AM Each Test Participant states their status on the daily call If testing Participants encounter obstacles between the daily calls, they notify a Market Testing Contact representative for assistance. ERCOT and PUCT Staff representative(s) are on the daily call as possible TTPT Sub-team is keeping a log of issues encountered in an effort to take these into consideration when drafting criteria for the next Flight. There is a process to notify Larry Grimm as needed. Glenn Wingerd supports Market testing on an “as needed” basis.

6. Daily Market Testing Communication Model With ITPTA ITPTA ITPTA - in addition to being completely independent, served as the centralized contact for… resolution and clarification of any type of Testing issue, obstacle, web-site maintenance, delays, script questions. Competitive Retailer Testing TNMP TDSP Entergy TDSP Sharyland TDSP Reliant TDSP AEP TDSP Oncor TDSP Competitive Retailer Testing Competitive Retailer Testing Competitive Retailer Testing ERCOTPUCT

7. Daily Communication Model Without an ITPTA Market Testing V1.4 F2 Contact Team Competitive Retailer Testing Competitive Retailer Testing Sharyland TDSP Entergy TDSP Competitive Retailer Testing Reliant TDSP Competitive Retailer Testing TNMP TDSP Oncor TDSP AEP TDSP Market Testing Contact team is responsible for addressing daily Market testing issues, concerns, requiring clarification. The Team is not responsible for resolving disputes or invoking the Market Testing Escalation process. ERCOT PUCT

8. Daily questions…How are they handled??? Due to the absence of an ITPTA, daily Market testing issues and questions would need to be communicated to and addressed by another party. The party taking ownership of this responsibility is a team formed called the Market Testing Contact Team. Process includes notification by e-mail as well as phone calls. The Market Testing Contact Team consists of… Revis Taylor ERCOT Market Testing Team Glenn Wingerd ERCOT Market Testing Team (shared resource) Ted Hailu Manager of ERCOT Client Relations Debbie McKeever Oncor, Chair of TTPT Sharon Polliard AEP, Vice Chair of TTPT Wendy Brubaker Systrends, Vice Chair of TTPT

9. Current Status as of May 1st. Flight V1.4F2 is in Frame 05 All ETOD transactions submitted to this date have been validated correct All End to End transactions required by Oncor and Reliant, submitted to this date have been validated correct. There have not been any issues or delays encountered in Frames 1,2, or 3 that required intervention from ERCOT Management or any other Market authority. Flight V1.4F2 is 10 days ahead of schedule. How are we doing???

10. ITPTA or ITPTA Staff TTPT Chair - Vice Chair TTPT/Team - Committee Activity and responsible party Set up daily conference call X X Daily conference call agenda X X Facilitate Daily call X X Monitoring daily progress X X Responding to testing needs X X Invoking Escalating process X X* Addressing issues X X Script Maintenance X ETOD maintenance X X Web-site Maintenance X X Notice to advance frames X X X Verify transactions if needed X X Test Criteria Maintenance X * With help of ERCOT Management and PUCT Staff Table identifies Market Testing responsibilities for Flight 1001 and V1.4F2 Flight 1001Flight V1.4F2

11. TTPT Concerns! While testing Participants are maintaining the schedule, this has not been an easy task for those involved. The Testing Contact Team members and TTPT members have other responsibilities and are unable to devote 100% of their time to duties previously performed by ITPTA. The Testing Contact Team will be able to respond to the Testing needs of 4 or 5 CRs. If Participants exceed this number for the July flight, greater involvement will be needed from Glen Wingerd and the ERCOT Market Testing Team to respond to the needs of the CRs. In addition, a centralized entity would be needed to assist in this effort. In order for the July flight and the Flight for V1.5 to be successful, the most knowledgeable resources possible must be available to participate in the activities leading up to the Flight. Further development of ETOD is needed for the Point to Point Transactions. TTPT members agree to some extent, the involvement of an ITPTA will be necessary for testing TX SET v1.5 to minimize risk and provide an independent view.

12. Three Market Test Flights are scheduled for 2002 April - Flight V1.4F2TX SET v1.4 JulyTX SET v1.4 SeptemberTX SET v1.5

13. TTPT activities… Continued support of the current Flight. Further refining of test criteria supporting TX SET v1.4 for the July flight. Work with ERCOT Market testing team to define Timeline for July Flight Develop test criteria for TX SET v1.5 Working with Market Participants and ERCOT as needed.

14. Questions???