1. Texas Test Plan Team Market Testing Update to RMS October 16, 2002

2. Activities Currently Supported by TTPT These are the primary activities supported by TTPT. TTPT participants include TDSPs, Affiliate CRs, Independent CRs, Vendors, PUCT Staff representatives, ERCOT Market Testing Team and ERCOT Client Relations. Activities TTPT Supporting 2002 Market Testing Flights and activities v1.5 activities to support Market Testing Muni/Coop efforts - Specific to Nueces, San Patricio, STEC Outage “Proof of Concept” testing and documentation Changes in data transport mechanisms with ERCOT ETOD debugging in progress (867 and 650 maps) Supporting New CRs entering the Market Monitoring Market changes in order to include Market change in Testing Documentation and participate as necessary.

3. TTPT Activities Supporting 2002 Market Testing Flights Since the last TTPT Update to RMS, TTPT has supported three Market Test Flights for 2002 Flight 0702 - Completed in early August Flight 0902 - Completed in early October Flight 1102 - In Progress - expected to be completed in December Participants in these Flights… CRs brand new to the Market Existing CRs participating in a new TDSP territory Existing CRs adding new business processes Re-testing participants (change in systems, service providers, party requesting to retest a particular process)

4. Participants of the Market Testing Flights! Flight 0702 Participants 4 CRs, 4 TDSPs, ERCOT Flight 0902 Participants 3 CRs, 4 TDSPs, ERCOT Flight 1102 Participants 5 CRs, 6 TDSPs, ERCOT In addition to these Flights, TTPT has supported re-testing for 4 CRs. These re-testing efforts have involved ERCOT and associated TDSPs.

5. Script Requirements per TDSP Territory RA script supports testing the format for the 820 payment CP script will continue to be tested until a Market decision is made to eliminate the transaction.

6. TTPT Supporting Market Testing Flights Prior to each Flight, TTPT hosts a Market Orientation meetings for parties interested in participating in a Flight. The intent at these meetings is to help pre-pare Testing Participants. Presentations include... TTPT - presents a Market overview TTPT - presents Market Testing Scripts for the Flight TTPT - presents an Overview of Market Testing Process & Requirements ERCOT - presents Pre-testing timeline, ETOD scripts, ETOD demo, helpful resources ERCOT - presents “The Role of ERCOT” PUCT - presents “PUCT Market Requirements” TTPT, PUCT, and ERCOT all support “Deadline for Signing Up” TTPT members, ERCOT Market Testing Team, and ERCOT Client Relations all work together to ensure the administration of the Flight is as successful as possible in order for the Flight to complete as quickly as possible. In addition to documentation a “Contact” list has been established to assist with quick response to support Testing Participants to be used during the Flight.

7. TTPT Activities Supporting v1.5 Testing Participating in the v1.5 Implementation Team activities Updated existing Market Testing documentation to ensure v1.5processes are included. Creating Test scripts supporting TX SET v1.5 Monitoring TX SET Change Controls in order to adjust scripts and testing documentation as needed Responding to v1.5 Market Participants as needed Updated F.A.Q.s on the Retail Testing web-site and held a F.A.Q. testing workshop to include new F.A.Q.s Developed and maintain v1.5 Market Testing Flight Timeline Working with ERCOT and Market Participants to ensure Testing concerns are addressed. These concerns include…

8. Concerns noted for Testing v1.5! “Will an ITPTA be retained to assist with testing v1.5?” TTPT recommends that some “Independent” involvement for the v1.5 Flight would be helpful. TTPT is working with ERCOT management to transition Market Testing Flight processes currently owned by the TTPT Chair to another Party. TTPT is also preparing documentation to assist with this transition. “Will the Testing Fee be charged for the v1.5 Flight? If charged will the fee be used to fund an ITPTA if one is retained?” Once a Market Participant has paid to test, there are not additional charges for testing. The Testing fee has been funding ETOD development and costs associated with an ITPTA. Currently there is not an ITPTA but ETOD development has continued and is “on going”. At this time it is unknown whether the testing fee will change, remain the same, or be eliminated for 2003 Testing Participants. Once this is determined, TTPT will assist in communicating this information.

9. Concerns Continued “Since all certified Retail Market Participants are going to be a testing Participant in the v1.5 Flight, and some new Market Participants will also be testing, and the testing process includes all Market Participants advancing together, are there some processes being developed to assist with ensuring Frames can advance and we are not delayed?” Yes, some of these processes include… “Testing Tracks” - A testing track is specifically created to assist each Participant to tests processes relevant to their business process. Scripts and simulated dates have been structured to support Existing Market Participants to complete v1.5 certification testing earlier than New Market Participants. “Once a delay in advancing frames is experienced, will there be a process to address the testing participant that continues to delay the advancing of Frames for others?” Yes, currently there is a document that addresses this concern. The “Escalation Process” is used if this situation is encountered.

10. Concerns Continued “Will ETOD be used for the v1.5 Flight?” Currently ETOD is used in every Market Testing Flight since the current process identifies all Testing Participants send their transactions to ETOD for validation. TTPT is working with the ERCOT Market Testing Team to ensure 1.5 transaction maps are completed and “debugged” in ETOD as soon as possible. “Will TDSPs currently using ETOD as their primary testing tool be able to rely upon ETOD for v1.5 or will it be necessary for all parties to complete “End to End” testing?” TTPT is working with the PUCT to review processes included in v1.5. It may be the recommendation of TTPT and the PUCT that some “End to End” testing should be supported by all 6 TDSPs. All 6 TDSPs will be included in the review and the recommendation.

12. TTPT Activities Supporting Muni-Coops A TTPT Sub-team has been formed to assist “Opt in” entities to prepare for Market Testing Flight v1.5. The Sub-Team is continuing to meet with Nueces, San Patricio, and STEC to ensure these entities can succeed once the Testing Flight begins. Due to the difference in billing models, Test Scripts have been developed specifically for to test these processes for these entities. Nueces TDSP San Patricio TDSP STEC CR Customer Bill to customer Calculates energy charge Meter reading Calculates energy charge

13. Outage “Proof of Concept” TTPT has been involved with this Team to ensure successful completion for Testing. TTPT is now working with this team to ensure documentation is sufficient for Market Participant understanding for those choosing to implement. TTPT is assisting in developing Market Testing scripts for CRs and TDSPs implementing this Market Standard to support testing Electronic notification for Outage - “Option 1”. Some documentation will be available on the Retail Testing web-site.

14. Market Changes involving data transport mechanisms with ERCOT TTPT Supporting https (FTP Replacement) and GISB v1.4 Activities TTPT has completed work with TDTWG and ERCOT to develop Market Test scripts supporting these testing mechanisms. These scripts are available on the Retail Testing Web-site. Since FTP is no longer available for new Market Participants, ERCOT & the TTPT is assisting new Testing Participants in understanding requirements for implementing https or GISB v1.4 for communication with ERCOT.

15. ETOD Debugging ETOD is complete with all 814 maps and some additional transactions. In order to support development of ETOD and ensure the additional maps being added to ETOD are correct, TTPT and existing Market Participants are working through a ETOD debugging effort. These Participants are concluding “debugging” 867 maps. 650 01, 02 debugging processes have recently begun. In addition to v1.5 Maps, additional maps will be added to ETOD to include all transactions used in the Texas Market.

16. Interested in the Texas Market Fully Certified Retail Market Participant Fully Certified active Retail Market Participant supporting Market activities and Market Working Groups Retail Testing Participant Completed Retail Pre-Testing Activities Successfully Completed Retail Market Testing and all ERCOT and PUCT Requirements TTPT Activities and Involvement Necessary to Support Future Market Participants TTPT develops timeline for pre-testing activities TTPT hosts Market Testing Orientation meetings, develops Flight criteria and supports the Flight as needed TTPT ensures completion of Flight is acknowledged TTPT assists new Market Participant with transition from Testing to Certified Participant joins working groups TTPT supports future Market Participant needs (Q&A, meetings, documentation)

17. TTPT is frequently the first line of contact for CRs attempting to enter the Texas Market. In order to meet the needs of these CRs, TTPT must continue to be proactive and responsive to the testing needs of future Market Participants and existing Market Participants. TTPT will continue to monitor Market improvement efforts and participate in these efforts as necessary. Monitoring Market changes in order to Include Market Change in Testing Documentation

18. Questions?