1. http://nodal.ercot.com 1 Market Readiness Seminar 6 Remaining Market Trials and Cutover Activities Sept 01, 2010

2. http://nodal.ercot.com 2 Antitrust Admonition ANTITRUST ADMONITION ERCOT strictly prohibits Market Participants and their employees who are participating in ERCOT activities from using their participation in ERCOT activities as a forum for engaging in practices or communications that violate the antitrust laws. The ERCOT Board has approved guidelines for members of ERCOT Committees, Subcommittees and Working Groups to be reviewed and followed by each Market Participant attending ERCOT meetings. If you have not received a copy of these Guidelines, copies are available at the Client Relations desk. Please remember your ongoing obligation to comply with all applicable laws, including the antitrust laws. DISCLAIMER All presentations and materials submitted by Market Participants or any other Entity to ERCOT staff for this meeting are received and posted with the acknowledgement that the information will be considered public in accordance with the ERCOT Websites Content Management Operating Procedure.

3. http://nodal.ercot.com 3 Agenda Review of Phase 5 Activities 168-Hour Test Breakdown of Activities –168-Hour Measurements Objective / Participation Requirements Entry / Exit Criteria Evaluation Criteria –Preparation Activities Completed – Full System Market and Reliability Tests Completed – Outage Scheduling Verification and Synchronization Completed – CRR September Auction Network Model Load Data Used for 168-Hour Test –Nodal Production Environment –168-Hour Test Execution Schedule Communications Plan Post 168-Hour Testing Activities Cutover and Market Readiness Activities

4. http://nodal.ercot.com 4 Review of Phase 5 Activities

5. Review of Phase 5 Activities Market Trials 2010 Roadmap http://nodal.ercot.com 5

6. http://nodal.ercot.com 6 168-Hour Test Measurements

7. http://nodal.ercot.com 7 168-Hour Test Breakdown of Activities: Objective / Participation Requirements Objective Conduct a full rehearsal of the Nodal Day-Ahead Market (DAM), Reliability Unit Commitment (RUC), Real Time Market and Load Frequency Control (LFC) Continuous seven day period of Market Systems and 48 hours of Closed Loop LFC Components required and to be exercised during the 168-Hour test: The Day Ahead functions including DAM, DRUC, HRUC and WRUC The Real Time systems performing SCADA, Network Security Analysis, Transmission Constraint Management, SCED, and LFC The Nodal support systems including Network Model Management, Outage Scheduler, Outage Evaluation tools Credit Monitoring and Management (CMM) Settlements and Billing Posting of applicable Reports and Extracts Participation Requirements T he value of the 168-Hour Test is dependent on participation by the Market. The 168-Hour Test is required by all registered Market Participants intending to be involved in the Nodal Market Participation data and metrics will be published and made readily available to the ERCOT Board, Independent Market Monitor and the related Market Participant Forums (NATF, TAC) Metrics will also include comparisons of Zonal Resource Plans to Nodal COPs. Participation should be reasonably reflective of post Go-Live behavior

8. http://nodal.ercot.com 8 168-Hour Test Breakdown of Activities: Entry / Exit Criteria Entry Criteria for the 168-Hour test will be as follows: All defined Market Trials Testing up until the 168-Hr test has been completed in accordance with the Market Trials Handbooks published to the Nodal Readiness Center ERCOT declares readiness for initiating the 168-Hour test to TAC and the Board and obtains director level sign off from ERCOT management. Exit Criteria 168 hours of continuous Nodal systems testing have been completed without encountering any major system issues that would prevent the Nodal Market from going live while maintaining system security and reliability as required by the ERCOT Protocols, Operating Guides, other binding documents, and NERC Reliability Standards. ERCOT provides a test summary report to TAC and the Board outlining the successful testing processes.

9. http://nodal.ercot.com 9 168-Hour Test Breakdown of Activities: Evaluation Criteria Evaluation Criteria was agreed on in coordination with the Market at the NATF and TAC forums Evaluation Criteria will be reviewed holistically in that no one issue from this list will necessarily constitute a failure of the test Evaluation Criteria is included in the Appendix of this presentation and in the 168- Hour Handbook

10. http://nodal.ercot.com 10 168-Hour Test Breakdown of Activities: Preparation Activities Full System Market and Reliability Tests The following tests have been completed prior to the start of the 168-Hour tests: 2-Hour Test – Completed May 20, 2010 8-Hour Test – Completed June 17, 2010 5-Hour Test – Completed July 21, 2010 24-Hour Test 1 – Completed August 5, 2010 24-Hour Test 2 – Completed August 20, 2010 40-Hour Test – Completed August 28, 2010 Total Full System Tests completed prior to the 168-Hour Tests: 103 Outage Scheduling Transition Plan 08/16/2010: ERCOT released the Outage Scheduler to be synchronized and verified by TSPs and QSEs for outages effective for the month of September 08/30/2010: TSP and QSE deadline to complete synchronization and verification Market Participants that have not yet completed this should: Continue work on this activity If there are questions or issues, contact ERCOT at martkettrials@ercot.commartkettrials@ercot.com Congestion Revenue Rights Auction 08/27/2010: ERCOT posted the Auction Results for the September Monthly Auction

11. http://nodal.ercot.com 11 168-Hour Test Breakdown of Activities: Preparation Activities Network Model Load 09/01/2010: Network model to be used during the 168-Hour test loaded to the Nodal Production Environment Going forward the network model loads will generally follow the Zonal schedule Data from Market Trials Phase 5 to be used in the 168-Hour test To the extent necessary to support settlement and credit operations, ERCOT will use estimated and/or settled data from Operating Days in July and August from MT5 as well as the CRR inventory from the September CRR auction (see above) during the 168-hour test.

12. http://nodal.ercot.com 12 Nodal Production Environment

13. http://nodal.ercot.com 13 Nodal Production Environment During the 168-Hour Test, applicable Nodal systems will be managed as if the systems were fully in production 7x24, exercising the same procedures used for Zonal production operations Change Controls during and leading up to the test shall adhere to a similar SLA as Zonal Production If an outage is required, a Market Notice will be issued and determination will be made if this will require a restart of the 168-Hour test

14. http://nodal.ercot.com 14 168-Hour Execution

15. http://nodal.ercot.com 15 168-Hour Execution: Schedule September 8, 2010 - 168-Hour Test begins –Day ahead Market will run for Operating Day September 9, 2010 using the DAM ACL sent from CMM –DRUC and WRUC will run per protocol timelines starting the first day of the test –ERCOT will begin running hourly HRUC at 1800 when the Adjustment Period opens. –All Real Time telemetry, and Market Submission shall continue to be submitted by the Market –All postings delivered in previous Market Trials Phases delivered per Nodal Protocol timelines –Initial DAM / RTM statements posted per the Nodal settlements calendar –Production level support, including those systems that are supported 24x7, goes into effect for the duration of the 168-Hour Test –For the duration of the test, DAM, RUC, Settlements and Credit processes will run per Nodal Protocol guidelines in an open loop format. Zonal will continue to commit units using the RPRS processes and actual, binding settlements will execute per Zonal Protocols. September 12 – September 14, 2010 – Full System Market and Reliability Test During the 168-Hour Test –September 12, 2010 at 2:00 PM, all generation will begin transitioning to Nodal control estimated to be completed by 3:00 PM –The ERCOT grid will run under Nodal Control through September 14, amounting to a total of 48 Hours of Full System Market and Reliability Testing during the 168-Hour Test –Day Ahead Market, RUC processes and SASM will continue to be executed per Nodal Protocols. Zonal will continue to commit units using the RPRS and OOMC processes and actual, binding settlements will execute per Zonal Protocols. –September 14, 2010 all generation will transition back to Zonal starting at 1:00 PM, estimated to be completed by 2:00 PM September 14, 2010 – September 15, 2010 –ERCOT will continue to run the remaining operating days of the 168-Hour test, executing DAM, RUC, settlements and credit processes –The final day of the 168-Hour test will be on September 15, 2010 September 16 or 17, 2010 –Special NATF session will be held to review the DAM testing results of the 168-Hour test and determine remaining testing objectives for Market Trials. RT testing results will be evaluated once RT settlement statements are received.

16. http://nodal.ercot.com 16 168-Hour Execution: Communications Plan ERCOT will host a daily WebEx / Conference call This will occur at 10am each day of the 168-Hour Test Details will be posted to the ERCOT calendar at http://www.ercot.com/committees/nodal/mt/ http://www.ercot.com/committees/nodal/mt/ ERCOT will maintain a list of known issues to updated each day on these conference calls This will be posted to the ERCOT Readiness Center on a daily basis Additionally, this will also be posted to the ERCOT calendar instance for that day. Issues Raised by the Market Market Participants will continue to utilize the markettrials@ercot.com email address outside of the daily conference callsmarkettrials@ercot.com Full System Market and Reliability Test ERCOT will maintain a separate WebEx conference during the 48-Hour test 9/12/2010: 12:00 PM – 12:00 AM 9/13/2010: 6:00 AM – 12:00 AM 9/14/2010: 6:00 AM – 2:30 PM Details for this WebEx will be sent out by Friday 09/03/2010

17. http://nodal.ercot.com 17 168HR Supporting Materials

18. http://nodal.ercot.com 18 Evaluation Criteria Validate ERCOT and Market Participants have the proper resources and expertise to manage a Nodal system for 7 days. This will be measured by the successful adherence to internal ERCOT procedures during the 168-Hour test to be validated by the ERCOT Training Department during the test and evidenced to the market within a report. Market Participant’s Nodal Accountable Executive will self attest to their criterion. Credit – monitor credit exposures, create credit reports and accurately reflect each market participant’s credit position based on their activity during the 168-Hour test. Validate data model accuracy between all systems including integration of the upstream NMMS system with downstream systems (e.g. DAM, MMS, EMS and CRR). This will be measured by existing ERCOT procedures. All issues observed regarding inaccurate modeling during the 168-Hour test will be reported on by ERCOT to the ERCOT Board, Independent Market Monitor, and the related Market Participant forums (NATF and TAC) as to the problem found, root cause of the error in the first place, and what process changes are being implemented to ensure that similar model accuracy issues do not reoccur going forward. ERCOT shall attest to the data model accuracy in and between all systems as a result of TSP and Resource Entity data passing the ERCOT validation rules. Execute DAM, DRUC, HRUC and WRUC for 7 days within timelines set by Nodal Protocols. If any activities fall outside of expected timelines, procedures for handling such incident must be executed by ERCOT personnel in adherence with Nodal Protocols and internal ERCOT procedures. Verify RT Operators can maintain system frequency to scheduled frequency, maintain ancillary obligations and resolve constraints during the period in which ERCOT will be performing Full System Market and Reliability tests during the 168-Hour Test.

19. http://nodal.ercot.com 19 Evaluation Criteria Validate ERCOT can effectively and accurately manage all constraints in both DAM and RT (i.e. not constrain on invalid contingencies or inaccurate line ratings) and system will utilize full list of competitive constraints. Validate that ERCOT can execute and manage all SPS, RAPs, PCAPs, MPs, and TOAPs to control congestion in the DAM, DRUC, HRUC, and RT as appropriate. Validate that ERCOT is accurately reflecting all congestion mitigation measures (SPS, RAPs) in DAM. The rolling CPS1 one minute average score must equal or exceed 100% during the Full System Market and Reliability test period. The target minimum is 125. Note that the CPS1 average will not take into account the two one-hour periods when ERCOT is transitioning to Nodal and then back to Zonal and any periods in which ERCOT must deploy RRS in response to system contingencies. Zonal Commercially Significant Constraints (CSCs) and Closely Related Elements (CREs). managed below thermal limits. Local Congestion managed below thermal limits. Stability limits managed below transfer limits. No NERC Disturbance Control Standard (DCS) failure if applicable. No LFC-SCED system issues that result in termination of the test. The 168-Hour test will provide adequate data to set the GREDP/CLREDP performance. criteria variables X, Y, and Z. ERCOT shall produce appropriate reports that can be used to set these variables. Bilateral trades are processed and flow through the market systems with results returned to MPS. Outputs from the Day Ahead Market, Reliability Unit Commitment, and Real Time Market can be reasonably explained based on the inputs.

20. 20 6/25/2016 Cut-Over Milestones 01 September 2010Market Readiness Seminar

21. 21 Nodal Cutover and Market Transition – Key Cut-Over Milestones Key Cut-Over Milestones Network Model Nodal Protocol Section 3.10 goes into effect (Sept. 1) TAC Approval – July 1 (July 20) Board Approval – July 20 Market Notice – July 30 Congestion Revenue Rights Nodal Protocol Section 7 goes into effect (Oct. 13) TAC Approval – August 5 Board Approval – August 17 Market Notice – September 13 Outage Scheduler Nodal Protocol Section 3.1 goes into effect (Nov. 1) TAC Approval – August 5 Board Approval – August 17 Market Notice – October 1 Full Nodal Operations Nodal Protocol Sections 3, 4, 5 and 6 go into effect as well as all other unimplemented Protocol Sections (Nov. 23) TAC Approval – October 7 th Board Approval – October 19 th Market Notice – October 23 rd 01 September 2010Market Readiness Seminar

22. 22 6/25/2016 Key Cutover Activities Thru December 2010 01 September 2010Market Readiness Seminar

23. 23 Cut-Over Timeline – Thru December 2010 01 September 2010Market Readiness Seminar

24. 24 Functional Area Task Plan Data Prep Decommission/Retirement Template Contingency/Back-out Template MayJuneJulyAugSeptOctNovDec Cut-Over Monthly Outlook – August Key Cut-Over Activities for August 2010 (08/01) Model: Begin network modeling timelines-Complete (08/13) OS: Outage Scheduler Zonal to Nodal Import process run (08/13) CRR: Last day to register for CRR December monthly auction (08/16) OS: ERCOT releases Outage Scheduler to Market (08/16-09/17) OS: Market Participants synchronize / verify outages in the Nodal Outage Scheduler to the Zonal Outage Scheduler for Outages effective during and after December 2010 Network Model Outage Scheduler Congestion Revenue Rights Entities Involved  ERCOT  TSP  REs  CRRAH  QSE Impacts TSPs/REs submit Transmission and Resource data for December model (05_Nodal_Load_transition_1_0.doc posted on 06/01 NATF Materials) Resource outages will NOT be imported during Zonal to Nodal import into Outage Scheduler CRRAH must register by deadline to be eligible to participate in the December Auction (Protocol 16.8.2) TSPs/QSEs can begin entering outages in Outage Scheduler via Web Service or UI TSPs/QSEs are responsible for verifying outages imported to Nodal Systems and correcting any missed outages or incorrect outages by 09/17/2010 Functional Area 01 September 2010Market Readiness Seminar

25. 25 Key Cut-Over Activities for September 2010 (09/01) Model: Network Model Go-Live (09/01) Model: Deadline to submit Model changes for Month of December (09/02) Model: Begin interim update process (09/01) CRR: ERCOT publishes CRR Activity Calendar to MIS (09/08) CRR: Deadline for PCRR NOIE Contract Eligibility (09/17-12/01) OS: Outages are synched. Market Participants maintain outages in both the Zonal and Nodal Outage Scheduler for outages effective December and beyond. Network Model Outage Scheduler Congestion Revenue Rights Functional Area MayJuneJulyAugSeptOctNovDec Cut-Over Monthly Outlook – September Entities Involved  ERCOT  TSP  REs  CRRAH  QSE Impacts TSPs / REs that submit Model changes to ERCOT by 09/01 will be applied prior to Go-Live From 09/02 forward until Go-Live any Model changes submitted to ERCOT for application prior to Go-Live will leverage the interim update process. MPs can retrieve the CRR Activity Calendar from MIS public with a valid Digital Certificate 01 September 2010Market Readiness Seminar

26. 26 Impacts MIS UI and EWS Get Report unavailable from 10/03-10/11 for production reconfiguration** CRRAH able to retrieve ACLs from CRR system each business day. MPs can post additional collateral until 11/08/2010 for Dec 2010 CRR Auction MPs able to start retrieving Go-Live postings on MIS. Refer to EMIL for dates per posting. Dec 2010 CRR Model available on MIS Dec 2010 Monthly Auction Notice available on MIS Functional Area Network Model Outage Scheduler Congestion Revenue Rights Credit MIS MayJuneJulyAugSeptOctNovDec Cut-Over Monthly Outlook – October Key Cut-Over Activities for October 2010 (10/01) CRR: CRR system data clean up for Go-Live (10/01) Credit: ERCOT assesses each CPs credit worthiness for the Dec CRR Auction (10/02) OS: First pull of December Outages for CRR Network Model (for PCRR Allocation) (10/02) Model: Network Model built for CRR Allocation and Auction (10/03-10/11) MIS UI and EWS Get Report function not available (ERCOT back end reconfiguration) (10/13) OS: Changes to December Outages considered for CRR Auction Model (10/13) Model: Changes to Model considered for CRR December Auction 01 September 2010Market Readiness Seminar

27. 27 Impacts CRRAH able to retrieve ACLs from CRR system each business day. MPs can post additional collateral until 11/08/2010 for Dec 2010 CRR Auction MPs able to start retrieving Go-Live postings on MIS. Refer to EMIL for dates per posting. Dec 2010 CRR Model available on MIS Dec 2010 Monthly Auction Notice available on MIS Functional Area Network Model Outage Scheduler Congestion Revenue Rights Credit MIS MayJuneJulyAugSeptOctNovDec Cut-Over Monthly Outlook – October Key Cut-Over Activities for October 2010 (10/14-10/19) CRR: ERCOT begins accepting PCRR Nominations for December Monthly Auction (updated) (10/15-11/15) Model: Network Operations Model posted to TSP Citrix location and TSPs begin validation process (10/26) CRR: ERCOT shall allocate PCRRs to NOIEs for the 2010 December Monthly Auction and publish to MIS (10/26) CRR: ERCOT shall post CRR Network Model for the 2010 December Monthly Auction to MIS (10/28-11/08) Credit: ERCOT posts ACLs daily for CRR December monthly auction to CRR (10/29) CRR: ERCOT to post December 2010 Monthly Auction Notice to MIS 01 September 2010Market Readiness Seminar

28. 28 MIS UI and EWS Get Report Reconfiguration Details (10/03/2010 – 10/11/2010) Market Participants will not have access to the MIS UI and EWS Get Reports functionality. Market Participants will need to use the direct links (listed on next slide) or Citrix to access system applications. All other EWS will be left on and from 10/1 up until the First Run Date as defined in EMIL of the CDR report, the EWS will return ‘no reports found’ during that time. MIS UI and EWS Get Report Go-Live (10/12/2010) Postings will be made available based on the EMIL posting date going forward. Postings live prior to 10/12/2010 will continue to be made available at this time. Market Participants will only have access to go-live posting data. Data from Market Trials activities is no longer available for download. Cut-Over Monthly Outlook – October – MIS UI and EWS Get Report Reconfiguration Details 01 September 2010Market Readiness Seminar

29. 29 URLs to be used during cutover activities: – Network Model via Citrix: – https://gateway.ercot.com/vpn/index.html https://gateway.ercot.com/vpn/index.html – Market Manager User Interface: – https://mis.ercot.com/mmsui/mmsui/displayTradesLanding.action https://mis.ercot.com/mmsui/mmsui/displayTradesLanding.action – Outage Scheduler Application: – https://mis.ercot.com/osrui/osrui/Summary.action https://mis.ercot.com/osrui/osrui/Summary.action – CRR Application (MUI): –https://mis.ercot.com/crr/mui/ListAllUserMessage.do - direct link for CRRAHshttps://mis.ercot.com/crr/mui/ListAllUserMessage.do –https://mis.ercot.com/crr/mui/editSMPCreditLimit.do - direct link for CPshttps://mis.ercot.com/crr/mui/editSMPCreditLimit.do –Web Services Endpoint URL: –https://misapi.ercot.com/2007-08/Nodal/eEDS/EWShttps://misapi.ercot.com/2007-08/Nodal/eEDS/EWS Cut-Over Monthly Outlook – October – MIS UI and EWS Get Report Reconfiguration Details 01 September 2010Market Readiness Seminar

30. 30 Impacts Available Credit Limit is locked for CRRAHs CRRAHs can submit disputes against CRR Auction Invoice via the API or MIS CRRAHs can receive postings on MIS QSEs can begin DAM Bid submission (15 submission items) Market checkpoint calls begin to facilitate issues and readiness LFC testing in November will not include Settlements Daily Market Conference Bridge starts 11/23 Functional Area Settlements Credit Congestion Revenue Rights Disputes Market Management MayJuneJulyAugSeptOctNovDec Cut-Over Monthly Outlook – November Key Cut-Over Activities for November 2010 (11/8/2010 12:00pm) Credit: Collateral Posting Deadline (Dec Auction) (11/8/2010 5:00pm) CRR: Credit Lock for Dec CRR Auction (11/9/2010 – 11/11/2010) CRR: December CRR Auction Bid Open/Close (11/12/2010) CRR: December CRR Auction Executes (11/15/2010) CRR: December CRR Auction Results published (11/16/2010) Settlements: December CRR Auction Invoice published (11/16/2010) Disputes: Dispute submitted to ERCOT for CRR Invoice (11/19/2010) Credit: Payment Due for December CRR Auction Invoices (11/22/2010) Settlements: Payments to CRRAH (Dec Auction) (11/23/2010) Credit: ERCOT to Release ACL (TPE and ACL Reports Available on MIS) (11/23/2010) Market Submission Opens (Remaining Protocol Go- Live) (11/24/2010) Model: Network Model Load (11/29/2010) Credit: ERCOT to Publish ACL for the initial Day-Ahead Market execution by ERCOT 01 September 2010Market Readiness Seminar

31. 31 Go-Live Sequencing Market Readiness Seminar01 September 2010 Cut-Over Monthly Outlook – Go-Live Sequence of Events TimeActionComments up to 10:00Bids and Offer submission QSE submit bids and offers 10:00Close DAM 10:00Execute Dam Clearing Process 13:30Approve DAM results Day Ahead results will be posted to MIS 14:00LFC Cutover Generation control moves to Nodal systems 1330-1430 Submit Post DAM COP and offers QSE submit Post Dam COPs and Offers 14:30Close for RUC 14:30Begin Execution of DRUC 16:00Approve DRUC Results 16:00Post DRUC Results 18:00HRUC executions Hourly HRUC runs hourly thru 23:59:59 of Operating Day

32. 32 Impacts Daily Market Calls continue for issue facilitation MPs receive 1 st Nodal Invoice for DAM and RTM via MIS MPs can submit Disputes via MIS or API Functional Area Network Model Settlements Congestion Revenue Rights Credit Market Management System MayJuneJulyAugSeptOctNovDec Cut-Over Monthly Outlook – December Key Cut-Over Activities for December 2010 (12/01/10) Nodal Program: Nodal Go-Live (Operating Day 1) (12/3/2010) Settlements: Nodal Day Ahead Market Statement & Invoice Available (12/3/2010) Disputes: Disputes submitted to ERCOT for DAM Invoice (12/8/2010) Credit: Nodal Payment Due for OD12/01/2010 (12/9/2010) Credit: Nodal Payout for OD12/01/2010 (12/15/2010) Model: Network Model Load (12/13/2010) Settlements: Nodal Real-Time Statement Available (12/16/2010) Settlements: Nodal Real-Time Invoice Available (12/27/2010) Credit: Nodal Payment Due for Real-Time Invoice 12/16/10 (12/28/2010) Credit: Nodal Payout for Real-Time Invoice 12/16/10 01 September 2010Market Readiness Seminar

33. 33 Nodal Cutover – Nodal System Readiness Criteria Nodal System Readiness Update 01 September 2010Market Readiness Seminar

34. 34 Nodal Cutover Communications – Zonal Protocol 21.12.3 21.12.3 Notice to Market Participants of Effective Date for Nodal Protocol Provisions and Retirement of Zonal Protocol Provision No part of the nodal market design may start operation until all the Market Readiness Criteria for that part of the nodal market design have been met. Certification that all Market Readiness Criteria have been met must be made at least by each of the following: the Technical Advisory Committee (TAC), ERCOT and the ERCOT Board. Upon such certification, ERCOT shall issue two Notices alerting Market Participants to the effective date of Nodal Protocol sections and the retirement of Zonal Protocol sections, as applicable. ERCOT shall issue the first Notice no less than thirty (30) days prior to the effective date or retirement date, as applicable, and the second Notice no less than ten (10) days prior to the effective date or retirement date, as applicable. The Notice shall include: (1)The Nodal Protocol Sections to become effective; and (2)The Zonal Protocol Sections to be retired, if any 01 September 2010Market Readiness Seminar

35. 35 Nodal Program Communications Readiness Signoff Schedule Network Operations Modeling 06/30 07/01 07/20 07/30 09/01 ERCOT Management Readiness Signoff TAC Approval Board of Directors Approval 30 Day Market Notice sent Nodal Protocol Section 3.10 goes into effect Congestion Revenue Rights 08/04 08/05 08/17 09/13 10/13 ERCOT Management Readiness Signoff TAC Approval Board of Directors Approval 30 Day Market Notice sent Nodal Protocol Section 7 goes into effect Outage Scheduling 08/04 08/05 08/17 10/01 11/01 ERCOT Management Readiness Signoff TAC Approval Board of Directors Approval 30 Day Market Notice sent Nodal Protocol Section 7 goes into effect Full Nodal Operations 10/01 10/07 10/19 10/23 11/23 ERCOT Management Readiness Signoff TAC Approval Board of Directors Approval 30 Day Market Notice sent Nodal Protocol Sections 3,4,5,6 go into effect as well as all other unimplemented Protocol Sections 01 September 2010Market Readiness Seminar

36. 36 Readiness Methodology ERCOT will measure readiness by the following categories: System Readiness – an evaluation of a particular system needed to support identified market activities Process Readiness – an evaluation of the Processes and Procedures necessary to support identified market activities People Readiness – an evaluation of ERCOT and Market Participant capabilities to support identified market activities ERCOT plans to review the Market Readiness Criteria at NATF and subsequently request a vote from TAC per Section 21.12.3, Notice to Market Participants of Effective Date for Nodal Protocol Provisions and Retirement of Zonal Protocol Provision 01 September 2010Market Readiness Seminar

37. 37 Readiness Methodology System Readiness – evaluation of the Nodal system to support the market design –Core system functionality delivered Protocol required system functionality available for market testing –System Integration delivered System to system integration delivered to support Market Timeline and Business Processes –Known defects resolution plan All ‘Must fix prior to go-live’ defects have a resolution plan in place –Active Readiness Metrics Current status of Readiness Metrics 01 September 2010Market Readiness Seminar

38. 38 Readiness Methodology Process Readiness – evaluation of the Processes and Procedures necessary to support the market design –Procedures complete ERT project procedures to support business processes complete –System cutover transition plan established ERCOT and Market Participant business activities required for transitioning into Go-Live have been established and communicated. –Market rules transition communicated Nodal and Zonal Protocol effective / retirement dates identified and communicated for Market Participant review 01 September 2010Market Readiness Seminar

39. 39 Readiness Methodology People Readiness – evaluation of ERCOT employee readiness and Market Participant knowledge to support the market design –ERCOT staff supporting Market Trials ERCOT Business teams supporting system execution, problem resolution, and Market questions –ERCOT staff trained on System and Processes ERCOT Business teams training status based on identified ERT training metrics –Market Participant Training delivered ERT external training classes and web based training provided by the Nodal training project 01 September 2010Market Readiness Seminar

40. 40 NMMS Overview Technical Advisory Committee2 September 2010 ERCOT NATF TAC BOD Recommendation of Certification Open Defects: Sev 1 Sev 2 Sev 3-5 0 Status / Other Issues: Stability issue resolved as of July 1 (ERCOT continues to monitor production) Navigation performance issues improved Aug 1st (43% reduction in response time measured) Validation performance improvement patch was added on Friday, August 27 th (expected a 20-40% reduction in validation time). Improvement on validation times were tested as follows: Average : 45.18% Median:66.41% Max:97.46% Deferred Defects: Deferred 11 0 0

41. 41 Network Operations Modeling – Go Live System ReadinessPlanned Completion Status SEM Go-Live 8/31/09Complete TSP Model Validation (Metric MP14C) 4/30/10Complete Model Change Request Tools Support Market Updates OngoingGreen Regular Model Loads into Market Trials Systems OngoingGreen 8 Hour LFC Test Executed w/ Network Model from NMMS 6/17/10Complete Process Readiness Network Operations Change Request Timeline Transition Plan established 6/03/10Complete Network Modeling Procedures Ready 8/01/10Complete Market Rules – Protocol Transition Plan for September 7/23/10Complete 01 September 2010Market Readiness Seminar Status updated post ERCOT, TAC, BOD approval – in RED

42. 42 Network Operations Modeling – Go Live People ReadinessPlanned Completion Status ERCOT Staff Support of Market Trials OngoingGreen ERCOT Staff Trained on System and Processes 6/22/10Green Market Participant Training Delivered 7/29/09Complete Readiness Review and Approval NATF Review 6/23/10 7/08/10 Complete ERCOT Management Approval 6/30/10Complete TAC Approval 7/20/10Complete BOD Approval 7/20/10Complete 30 Day Market Notice 7/30/10Complete 10 Day Market Notice 8/20/10Complete 01 September 2010Market Readiness Seminar Status updated post ERCOT, TAC, BOD approval – in RED

43. 43 OS Overview Technical Advisory Committee2 September 2010 ERCOT NATF TAC BOD Recommendation of Certification Open Defects: Sev 1 Sev 2 Sev 3-5 0 Status / Other Issues: No defects reported in the Outage Scheduler –Outage Scheduler transition tasks were completed on 8/13 and the system was ready for dual entry and validation on 8/16 –Market Notice for dual entry and validation was sent on August 16 th All Outage scheduler issues within the TSP Issues list have either been addressed or are resolved Deferred Defects: Deferred 119 0 0

44. 44 Outage Scheduling – Go Live System ReadinessPlanned Completion Status Outage Scheduler released to Market Trials 2/01/10Complete Outages Scheduler Integrated with DAM, RUC 4/15/10Complete Outage Scheduler Qualification Connectivity Qualification (MP20) 4/01/10Green Process Readiness Verify Outage Evaluation System Functionality (EMO3 #1) 6/23/10Green Outage Coordination Procedures 7/16/10Complete Nodal Protocol Transition Plan Updated for Outage Scheduling 7/29/10Complete Outage Scheduling Transition Plan Established 7/08/10Complete 01 September 2010Market Readiness Seminar

45. 45 Outage Scheduling – Go Live People ReadinessPlanned Completion Status ERCOT Staff Support of Market Trials OngoingGreen ERCOT Staff Trained on System and Processes 09/03/10Green Market Participant Training Delivered 7/15/10 NMMS/OS work- shop added Overall Readiness NATF Review 7/08/10, 07/29/10 Complete ERCOT Management Signoff 8/04/10Complete TAC Approval 8/05/10Complete BOD Approval 8/17/10Complete 30 Day Market Notice 10/01/10 10 Day Market Notice 10/21/10 01 September 2010Market Readiness Seminar

46. 46 CRR Overview Technical Advisory Committee2 September 2010 ERCOT NATF TAC BOD Recommendation of Certification Open Defects: Sev 1 Sev 2 Sev 3-5 0 Status / Other Issues: Working with Siemens on automated processor fix. Expectation is to receive fix before Go-Live –Incorrect Loadzone Designation from Topology Processor Output file –Resource Nodes missing from Settlement Point output file produced by Topology Processor –Topology Processor cannot consume outages information for CRR modeling –CRR MUI requires a system reboot for Bid Limit to take effect (internal to ERCOT) workaround is nuisance - targeting 09/13/2010 resolution Deferred Defects: Deferred 4 0 4

47. 47 CRR Allocation and Auction – Readiness Update System ReadinessPlanned Completion Status CRR System released to Market Trials 2/01/10Complete CRR Integrated in Market Trials 5/01/10Complete CRR Account Holder Connectivity Qualification MP 15 (B) 9/17/10Red** Operation of CRR Auctions and Allocations (CRR3) 8/17/2010Complete Verify CRR Auction Invoices (CO8) 8/17/2010Complete Process Readiness CRR Procedures 6/25/10Complete Nodal Protocol Transition Plan Updated for CRR 7/29/10Complete TCR to CRR Transition Plan (CRR4) 9/29/09Complete ** Red due to MPs registering but not working to get qualified. (inflated denominator) 01 September 2010Market Readiness Seminar

48. 48 CRR Allocation and Auction – Go Live People ReadinessPlanned Completion Status ERCOT Staff Support of Market Trials OngoingIn Progress ERCOT Staff Trained on System and Processes 06/25/10Complete Market Participant Training Delivered 07/15/09Complete Overall Readiness ERCOT Management Signoff 08/04/10Complete NATF Review 07/08/10, 07/29/10 08/03/10 Complete TAC Approval 08/05/10Complete BOD Approval 08/17/10Complete 30 Day Market Notice 09/13/10 10 Day Market Notice 10/03/10 01 September 2010Market Readiness Seminar

49. 49 MMS – Day Ahead, Adjustment Period, RT Market Overview Market Readiness Seminar01 September 2010 ERCOT NATF TAC BOD Recommendation of Certification Open Defects: Sev 1 Sev 2 Sev 3-5 0 Status / Other Issues: MMS currently has 58 Open defects in Test targeted to be fixed by September 3. 21 DAM 2 AS Mgr 1 CIM, 1 SASM, 1 CCT, 1 Validation Rules 9 Background Processing 3 SCED 6 RUC 13 Market Infrastructure including 6 GUI MMS currently has 24 Open defects in development targeted to be fixed by October 1. 6 DAM, 4 RUC, 4 SCED, 3 MI, 7 GUI MMS remaining 13 (7 performance, 3 MOI, 3 MI) defects are being reviewed by business for final disposition. Deferred Defects: Deferred 44 43 52

50. 50 MMS – Day Ahead, Adjustment Period, RT Market – Readiness Update System ReadinessPlanned Completion Status MMS System release to Market Trials2/01/10Complete Market Submission Connectivity Qualification (MP3)OngoingGreen Real-Time Market Daily Participation (MP15A)OngoingGreen Generate LMP’s for 6 months (MO5)OngoingGreen Verify SCED Price Validation (MO4)OngoingGreen DAM Participation (MP16)OngoingAmber Generate Day-Ahead LMPs (MO9)OngoingGreen Verify DAM Price Validation (MO8)OngoingGreen DRUC Execution (MO10)OngoingGreen Verify Supplemental Ancillary Services Market (MO3)OngoingGreen Process Readiness Day Ahead, Adjustment Period and RTM Procedures 8/31/10Complete MMS Day Ahead & Real Time Price Validation Procedures8/31/10Complete Nodal Protocol Transition Plan Updated for DAM, RUC, SASM, SCED People Readiness ERCOT Staff Support of Market Trials 09/30/2010In Process ERCOT Staff Trained on System and Processes8/27/10Complete Market Participant Training DeliveredOngoingIn Process 01 September 2010Market Readiness Seminar

51. 51 EMS – Real-Time Operations Market Readiness Seminar01 September 2010 ERCOT NATF TAC BOD Recommendation of Certification Open Defects: Sev 1 Sev 2 Sev 3-5 0 Status / Other Issues: EMS currently has 20 Open defects in development targeted to be fixed by October 1. 1 EMS Interface, 1 CIM Importer, 1 PSSE export 6 STNET/SMTNET/OE 1 VSAT 3 RLC 1 SE 2 TCM 3 LFC/Generation Deferred Defects: Deferred 321 12 8

52. 52 EMS – Real-Time Operations Readiness Update System ReadinessPlanned Completion Status EMS System Release to Market Trials2/1/10Complete Verify ACE Performance (EMO5)4/21/2008Complete Individual LFC Testing (EMO6)5/31/2010Green Telemetry / ICCP System Failover (N2)OngoingGreen Telemetry Compliance (MP6)6/2/2010Green Validate Telemetry / SE ISM / Data Accuracy (E3)Planned State Estimator Standards Performance (EMO9)OngoingGreen RTCA Zonal to Nodal Modeling Differences (EMO9)OngoingAmber RTCA CSC Zonal to Nodal Comparison (EMO9)OngoingGreen Verify Voltage Support Functionality (EM02)9/8/2010Planned Anomalous/Auto-Disabled Telemeted Points (EMO10)OngoingGreen Verify Load Forecast Accuracy (EMO7)Planned Process Readiness RT Operations Business Procedures8/31/10Complete Nodal Protocol Transition Plan Updated for RT Operations7/29/10Complete People Readiness ERCOT Staff Support of Market Trials9/30/10In Process ERCOT Staff Trained on System and Processes9/3/10In Process Market Participant Training DeliveredOngoingIn Process 01 September 2010Market Readiness Seminar

53. 53 COMS – Settlement & Billing, Metering, and Data Aggregation - Overview Technical Advisory Committee2 September 2010 ERCOT NATF TAC BOD Recommendation of Certification Open Defects: Sev 1 Sev 2 Sev 3-5 0 Status / Other Issues: There are only 5 Open defects related to Core Systems at this time that are scheduled to be resolved by 09/03/2010. -Adjustment to queries in Appworx Scheduling Job -IDR Staging Performance Enhancement -Adjustment to DAM Start Logic -Adjustment to Data Aggregation to prevent file aborts from missing data -Adjustment for AIEC calculation logic when RTPERFIP missing There are 11 Commercial System Integration (CSI) defects related to transfer of data Deferred Defects: Deferred 45 6 9

54. 54 S&B – Settlements and Billing, Metering, and Data Aggregation Readiness Update System ReadinessPlanned Completion Status S&B System release to Market Trials5/01/10Complete Verify RTM Settlement Statements (CO5)OngoingGreen Verify RTM Settlement Invoices (CO6)OngoingGreen Verify DAM Settlement Statements (CO3)OngoingGreen Verify DAM Settlement Invoices (CO7)OngoingGreen Verify CRR Auction Invoices (CO8)OngoingGreen Settle Market for 7 days and provide appropriate extracts (CO1)8/25/2010Planned Verify Dispute Process (CO2)9/22/2010Planned Zonal/Nodal Coordinated Settlement Operations (CO4)8/25/2010Planned Process Readiness Settlements and Billing Procedures8/24/10Complete Nodal Protocol Transition Plan Updated for Settlements and Billing7/29/10Complete People Readiness ERCOT Staff Support of Market Trials9/30/10In Process ERCOT Staff Trained on System and Processes7/30/10In Process Market Participant Training DeliveredOngoingIn Process 01 September 2010Market Readiness Seminar

55. 55 COMS – Credit Overview Market Readiness Seminar01 September 2010 ERCOT NATF TAC BOD Recommendation of Certification Open Defects: Sev 1 Sev 2 Sev 3-5 0 Status / Other Issues: Open issues related to an intermittent performance issue and reporting and notifications. All items are internal ERCOT fixes targeting a 09/03/2010 resolution date. –NPRR 241 - CMM:FCE Detail reports runs long –Exposure calculation engine hung process on –EAL Detail Report - In the OIA Section the corresponding Invoice data display –E-factors- Email notification about e-factors values to the counter-parties is not working correctly –Entity Name field is missing from the Enter CP Estimates screen –AIL Report- if the RTM Estimated data is missing for an Operating Date the report is not displaying data correctly Deferred Defects: Deferred 45 5 1

56. 56 CMM – Credit Management and Monitoring – Go Live draft System ReadinessPlanned Completion Status Credit Management Integrated in Market Trials5/3/10Complete Verify Credit Calculations (CO10)9/8/2010Planned Process Readiness Credit Management Procedures8/24/10Complete Nodal Protocol Transition Plan Updated for Credit Management7/29/10In Process People Readiness ERCOT Staff Support of Market Trials 9/30/10In Process ERCOT Staff Trained on System and Processes8/13/10Complete Market Participant Training DeliveredOngoingIn Process 01 September 2010Market Readiness Seminar

57. 57 MIS - Market Information System Overview Market Readiness Seminar01 September 2010 ERCOT NATF TAC BOD Recommendation of Certification Open Defects: Sev 1 Sev 2 Sev 3-5 0 Status / Other Issues: MIS defects of highest priority are around Extract Subscriber and LMP Contour Map and are targeting a resolution date by 10/11/2010. Fixes for most of these are already developed and will be tested during the MIS reconfiguration downtime. Examples are: –Extract Subscriber - No choice to select the extract format –Extract Subscriber - Unable to unsubscribe the subscribed extract. –Extract Subscriber – ‘Help’ icon is not being displayed in Extract Subscriber application –LMP Contour Map Dashboard does not allow for alternate dates Deferred Defects: Deferred 7 9 3

58. 58 MIS – Market Information System – Go Live draft System ReadinessPlanned Completion Status MIS System release to Market Trials2/1/10Complete MIS Compliance Test (E12)9/8/2010Planned Process Readiness MIS Procedures8/25/10Complete Nodal Protocol Transition Plan Updated for MIS7/29/10Complete People Readiness ERCOT Staff Support of Market Trials 9/30/10In Process ERCOT Staff Trained on System and Processes8/20/10Complete Market Participant Training DeliveredOngoingIn Process 01 September 2010Market Readiness Seminar

59. 59 Nodal – Overall Readiness – Go Live draft Market Participant Readiness ItemsPlanned Completion Status QSE with Resource Connectivity to EDS Environment (MP2)9/4/2008Complete ICCP Point to Point Telemetry Test (MP5)9/4/2008Complete QSE Ability to Submit Transactions via MIS (MP8)9/4/2008Complete QSE Ability to Submit Web Services Transactions (MP9)9/4/2008Complete Resource Registration (MP11)8/25/2010Green Wind Generation Resources ICCP Metrological Telemetry (MP21)OngoingAmber New Entrant Readiness (MP22)8/25/2010Green Telemetry Quality (MP to ICCP Server) (MP23)OngoingGreen Mapping of Resource and Loads in Private Area Networks (MP18)8/25/2010Green Telemetry Compliance (MP6 - TSP)6/2/2010Green Market Participant Nodal Readiness Declaration (R0)10/19/2010Planned Independent Market Monitor Market Monitor Systems Capability (IMM1)10/19/2010Planned Validate ISM Access & Accuracy of Postings Required by the IMM (E7)10/19/2010Planned 01 September 2010Market Readiness Seminar

60. 60 Nodal – Overall Readiness – Go Live draft ERCOT ReadinessPlanned Completion Status ERCOT Internal Training (E1)OngoingGreen Develop Nodal Procedures (E9)OngoingGreen Develop Nodal Operating Guides (E6)8/25/2010Planned Validate ISM, CDR, and Lodestar Source Reporting Access & Accuracy for internal ERCOT use (E10) 10/19/2010Planned Verify ERCOT Performance Monitoring Test Plan (E2)10/19/2010Planned Nodal SAS 70 Preparedness (E5)10/19/2010Planned ERCOT Staffed for Texas Nodal Operations (E8)8/25/2010Green Verify QSE Performance Monitoring Test Plan (E14)10/19/2010Planned Verify TSP Performance Monitoring Test Plan (E15)10/19/2010Planned Operating Personnel and Facilities Readiness (EMO13)8/11/2010Complete ERCOT Operating Personnel and Facilities Readiness (MO7) 8/11/2010Complete Conduct EEA Test (EMO8)9/8/2010Planned 168-Hour Test Completion (R3)9/22/2010Planned ERCOT Nodal Readiness Declaration (R1)10/19/2010Planned Develop Texas Nodal Market Launch Plan (R2)9/22/2010Planned 01 September 2010Market Readiness Seminar

61. 61 Nodal – Overall Readiness – Go Live draft Contingency PlansPlanned Completion Status Contingency Plan for Weekly, Daily and Hourly RUC Failure (C1)10/01/2010Planned Contingency Plan for DAM / LMP Failure (C2)10/01/2010Planned Contingency Plan for ICCP Data Failure (C3)10/01/2010Planned Contingency Plan for SCED Failure (C4)10/01/2010Planned Contingency Plans for Key Settlement and Financial Transfer Processes (C5)10/01/2010Planned Develop Plan for SE Failure (C6)10/01/2010Planned Contingency Plan for a Backup Facility (C7)10/01/2010Planned Contingency Plan for Portal/API Failure (C8)10/01/2010Planned Contingency Plan for Site Unavailability (C9)10/01/2010Planned Verify Single Point of Failure Recovery EMS/MMS/NMMS/CRR/COMS (C10)10/01/2010Planned 01 September 2010Market Readiness Seminar

62. 62 6/25/2016 Cut-Over Communication Plan 01 September 2010Market Readiness Seminar

63. 63 Nodal Cutover and Market Transition – Communication Plan Friday Market Calls Starting 09/03/2010 at 9AM-12noon these calls will be combined, without breaks, into a single Market Trials and Cut-over Activities call Market Participants should plan on attending the full duration of this call as it will provide the primary means of communication between ERCOT and the Market. Information and materials covered in this call will continue to be posted to the ERCOT calendar website every Friday at the following URL: http://www.ercot.com/committees/nodal/mt/ http://www.ercot.com/committees/nodal/mt/ Monday Kick-Off Calls As needed to review the cutover activities for the week Market Notices and Market Participant Contact Lists ERCOT will continue to leverage Market Notices to communicate pertinent information that is required to be consumed by the Market as a whole. Market Participants employees can subscribe to the Market Notices on the ERCOT Lists website at the following URL: http://lists.ercot.com/scripts/wa-ercot.exe?HOME.http://lists.ercot.com/scripts/wa-ercot.exe?HOME Market Participants may verify their contact information on file with ERCOT through their assigned Whole Client Services Representative. 01 September 2010Market Readiness Seminar

64. 64 Nodal Cutover and Market Transition – Communication Plan (Cont.) Market Participants Contacting ERCOT Market Trials email inbox: markettrials@ercot.com. This inbox will continue to be maintained throughout Nodal Cutover. This will serve as a “catch-all” forum for questions if there is any doubt as to where a question should be submitted.markettrials@ercot.com Friday Market Calls: In line with the previously mentioned schedule, these Market Calls not only serve as the primary means for ERCOT to communicate to the Market, but also for MPs to field general questions concerning the Nodal Cutover plan. ICCP email inbox: ERCOTICCPSupport@ercot.com for specific MP questions regarding their Nodal ICCP / Telemetry, this email address should be leveraged for the fastest response.ERCOTICCPSupport@ercot.com ERCOT Wholesale Client Services Account Manager: Whenever possible MPs should leverage the Market Trials email inbox, however, MP’s Wholesale Client Services Account Manager will also be equipped to either answer your questions or route you to the correct support personnel. Nodal Advisory Task Force (NATF): NATF will serve as a forum for initially reviewing changes in activities during the ERCOT Nodal Cutover, NPRRs and any concerns from the Market that would impact the overall Cutover plan. To that end, NATF will be meeting more frequently to ensure expedient coverage of these types of issues. Details regarding meeting agendas and materials from past meetings will continue to be maintained at the following URL: http://www.ercot.com/committees/board/tac/natf/http://www.ercot.com/committees/board/tac/natf/ 01 September 2010Market Readiness Seminar

65. 65 Nodal Cutover and Market Transition – Communication Plan (Cont.) Go-Live Communication Strategy Purpose and Objectives Maintain reliable grid operations during the Go-Live period Maintain constant interaction to respond quickly and effectively to issues that arise during the go-live period Respond and report any observed anomalies in market performance or behavior Go-Live Period Communication Market Calls Daily and at times hourly conference calls between ERCOT and Market Participants will start on 11/23/2010. ERCOT will set up the logistics of the calls and communicate via a Market Notice and the Cutover Handbook Stabilization Period Communication Market Calls Daily Market Calls thru 12/07/2010 then adjust to weekly/biweekly based on need Daily Issue / Inquiry Wholesale Client Service Reps Retail Client Service Reps ERCOT Helpdesk **More details and updates on the Go-Live Communication plan to be presented in the coming months 01 September 2010Market Readiness Seminar

66. 66 Nodal Cutover and Market Transition – Reversion Plan Reversion Plan Approach: 12/01/2010 – 12/02/2010: Zonal and Nodal systems continue to process in parallel. This allows for 48hrs of stabilization (2 Operating Days) with parallel processing similar to the level of effort being performed with the LFC Testing 12/03/2010 – 12/31/2010: Zonal systems “Retire” where processing is disabled, but remain in place in the event they are needed to be reinstated quickly. 01/01/2011: Zonal System Decommissioning begins 01 September 2010Market Readiness Seminar

67. 67 Nodal Cutover and Market Transition – Upcoming Events EventAgendaDateLocation Nodal Market Call Combined Market Trials and Cutover call between ERCOT and Market Participants begins 09/03/2010 9am-12pm Conf. Call/Web Ex Nodal Cutover Update Post Go-Live Activities for January, February, March, and Reversion Plan End September Conf. Call/Web Ex 01 September 2010Market Readiness Seminar

68. 68 Next 60-days of Nodal Classes/Workshops Course Start DateLocation Congestion Revenue RightsAugust 31ERCOT Met Center (Austin) Generation 201September 1Hilton Austin Airport (Austin) Economics of LMPSeptember 13ERCOT Met Center (Austin) ERCOT 101 for Wind GenerationSeptember 13Optim Energy (Dallas) ERCOT Nodal 101September 14StarTex Power (Houston) Generation 101September 15Hilton Austin Airport (Austin) Basic Training ProgramSeptember 20LCRA (Austin) Load Serving Entity 201September 27ERCOT Met Center (Austin) Congestion Revenue RightsSeptember 29Suez Energy (Houston) ERCOT Nodal 101October 5RBS Sempra (Stamford, CT) Basic Training ProgramOctober 18Suez Energy (Houston) Enrollment at: http://nodal.ercot.com/training/courses/index.htmlhttp://nodal.ercot.com/training/courses/index.html 01 September 2010Market Readiness Seminar

69. 69 01 September 2010Market Readiness Seminar