1. http://nodal.ercot.com 1 Single Entry Model (SEM) Weekly Market Call September 17, 2009 Matt Mereness

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 SEM Weekly Market Call Agenda Antitrust Admonition SEM Go-Live Update Transition to NDSWG Reference only- –Market Testing Update –Readiness Dashboards –SEM Go-Live Criteria and Approval –FAQ/ Open Issues –Appendix/Supporting Info –What is SEM? –Go-Live timeline and activities –Training overview and sign-up –Readiness metrics related to training and testing –Communication mailbox and SEM Market Call Schedule

4. SEM update –Planned Outages: –Sun Sep 13: noon-8pm Data center migration –Wed Sep 16: 7-8pm Address XML import issues –Unplanned Outages: –Friday Sep 11: 10:30am – 1:45pm –Future Outage: –Saturday Sep 26: 3:30 - 4:30pm Address Citrix configuration (no market facing changes) –Outage communications –Transition to zonal communication channels –Going forward all NMMS outage notices sent to ROS and NDSWG Reminder that ERCOT is applying NOMCRs to zonal production and nodal test systems Model posting to TSPs Next CIM model post by Sept 16 th CIM File download issue - Issue for at least one company to download large file - ERCOT can FedEx SEM Go-Live Update

5. http://nodal.ercot.com 5 SEM Go-Live Update (continued) Discussion at Sep 15 th NDSWG of issues –Ownership updates Global list sent to TSPs for changing ownership in spreadsheet format TSP feedback to ownership is directly implemented by ERCOT ERCOT can provide quick turnaround for certain equipment as needed to allow NOMCR –Addressing details of coordination for NOMCRs that invalidate Outages Example- NOMCR for line name change that has a future outage scheduled (breaks outage) –Ownership/Operatorship definitions will be discussed at NDSWG –…other issues –Agreement to start working a punchlist of priorities through NDSWG

6. http://nodal.ercot.com 6 Training/Testing Update Training –Reminder of make-up class scheduled Sept 29-Oct 1 –Sign up using LMS - https://www.ercottraining.com/lms/default.asphttps://www.ercottraining.com/lms/default.asp –Email nomcrhelp@ercot.com if problems with signing up for second classnomcrhelp@ercot.com –Class is half full (8 seats available) Test Sandbox Environment Update: –Configuring this week –Email to NDSWG will confirm when set-up is complete

7. http://nodal.ercot.com 7 Transition to NDSWG Agreement at NDSWG to discontinue SEM market calls Plan is for bi-weekly (every 2 weeks) NDSWG Web-Ex –Objective to work and prioritize modeling issues and activities related to the SEM implementation NOMCRHelp email will remain up and running

8. http://nodal.ercot.com 8 Roll-call and Q&A Production environment URL –URL- https://gateway.ercot.comhttps://gateway.ercot.com Important Reminder(s): –Production issues should be sent to nomcrhelp@ercot.com and helpdesk@ercot.comnomcrhelp@ercot.comhelpdesk@ercot.com –Re-set password can come from HelpDesk 512.248.6800 or your USA –Make up training class Enroll at https://www.ercottraining.com/lms/default.asphttps://www.ercottraining.com/lms/default.asp Updated training curriculum v7 Aug 5- http://www.ercot.com/committees/nodal/eds/sem/indexhttp://www.ercot.com/committees/nodal/eds/sem/index –Populated CIM file request (9/16/09) Posted in TML Production 9/16 Questions and Answers No more market calls- look for NDSWG emails (subscribe to NDSWG exploder)

9. http://nodal.ercot.com 9 Appendix/Supporting Info –What is SEM? –Readiness Criteria –Go-Live timeline and activities –Training overview and sign-up –Dates/ methods to test submissions of NOMCRs

10. http://nodal.ercot.com 10 SEM Go-Live Overview Single Entry Model (SEM) Go-Live is the switchover on Aug 31, 2009 for TSP submissions of network operations model change requests –from “Service Request” submissions via TML –to “NOMCR” submissions via the NMMS System of record for model changes becomes NOMCRs on 8/31//09 System of record for Network operations Model for reliability and dispatch remains Zonal/Genesys system until Dec 2010 TSP Current Activity Submit Modeling Change via Service Request ERCOT Uploads Svc Request into Zonal Genesys Model ERCOT Copies/Converts Zonal Model “seed” Into Nodal NMMS Model TSP Aug 31, 2009 Submit Modeling Change via NOMCR/NMMS Tool (includes ICCP) ERCOT Incrementally Converts NOMCR Into Svc Req Uploads into Zonal Genesys Model ERCOT uploads NOMCR Into Nodal NMMS Model to support nodal testing Data Consistency Checks are run to ensure model synchronization/fidelity Periodic checks are run to ensure model synchronization/fidelity Full Copy Incr. NOMCR

11. 11 Current Network Operations Model Maintenance for TSPs ERCOT Zonal EMMS Model (system of record through 12/1/2010) Submits Service Request to Change Model ERCOT Nodal NMMS Model (nodal testing model- CIM file for EMS/MMS/etc) Periodic full copy and conversion of model (zonal seed used for nodal systems) TSP

12. 12 After 8/31/2009: SEM Go-Live Network Operations Model Maintenance for TSP ERCOT Zonal EMMS Model (system of record through 12/1/2010) ERCOT Nodal NMMS Model (nodal testing model- CIM file for EMS/MMS/etc) ERCOT enters NOMCRs into zonal model ERCOT runs consistency checks to ensure models are aligned and maintained Submits Model Change Request (NOMCR) TSP NMMS Model System of Record Nodal Go-Live 12/1/2010

13. 13 Network Operations Model Maintenance for Resource & QSE (today and post 8/31/09) ERCOT Zonal EMMS Model (system of record through 12/1/2010) ERCOT Nodal NMMS Model (nodal testing model- CIM file for EMS/MMS/etc) ERCOT enters into zonal model NMMS Model System of Record Nodal Go-Live 12/1/2010 Submits RARF (Resource Asset Reg Form) via Service Request Submits ICCP Change via Service Request ERCOT process QSE RE

14. http://nodal.ercot.com 14 SEM Go-Live Market Engagement Dashboard (as of 8/27/2009) Notes- ERCOT working one TSP to catch-up on final testing/training - TSP has signed up for Sep 29 th make-up training - ERCOT will support this TSP (and any other TSP) with assistance in submission of NOMCRs

15. Overall SEM Go-Live ERCOT/Market Criteria Dashboard Summary of Criteria from TAC-approved SEM Go-Live Procedure (http://nodal.ercot.com/readiness/golive/index.html )http://nodal.ercot.com/readiness/golive/index.html

16. http://nodal.ercot.com 16 Go-Live timeline and activities (continued) Communication –May 6 th ERCOT began TSP outreach through Wholesale Client Services TDSP/TO associations sent to 23 TOs Solicit training headcount from TOs (pre and post Go-Live) Good response from TOs

17. http://nodal.ercot.com 17 Go-Live timeline and activities (continued) Communication and Calendar –May 15- Market Notice sent for SEM Kick-off call to occur –May 28- SEM Kick-off WebEx 10:00-11:30am Go-Live timelines and activities for June - August 2009 Training overview and sign-up Dates and access methods to test submissions of NOMCRs Readiness metrics related to training and testing Communications mailbox and SEM market call schedule –June 4- Start weekly Thursday SEM Calls at 2-3pm (through go-live/August) Company attendance is recorded ERCOT provide updates on testing and training Highlight issues or Frequently Asked Questions Open Question/Answer session for TSPs Meetings will be posted on ERCOT calendar at http://www.ercot.com/committees/nodal/eds/http://www.ercot.com/committees/nodal/eds/ –June 8- Testing environment available to TSPs (through Aug 10) –June 22- Weekly classroom training for 6-weeks (through July 30)

18. http://nodal.ercot.com 18 Training Overview and Sign-Up (continued) Classroom schedule for the 3-day class One class per week for 6 weeks Start 1pm Tuesday / End noon Thursday Trainees can stay in Lab Thursday afternoon for Q&A If schedule fills up, ERCOT will shorten class to 2-days for the overbooked weeks June 23-25, June 30- July 2 July 7- 9, 14-16, 21-23, 28-30 Next 4 slides show summary of training format and equipment Full training outline in Appendix (no change from last month) Note that testing/training will only include Level 1 Validation Level 1 – Automatic by the system upon submitting. Level 2 – Visual by the N/W Model Coordinator Level 3 – Power flow run on the one NOMCR. Level 4 – Power flow run on all NOMCRs for that day. Level 5 – Power flow run on the AREVA system.

19. Training (continued)

23. http://nodal.ercot.com 23 Training Overview and Sign-Up (continued) Sign-up for access to test environment starts today System access begins June 8 th Email request to nomcrhelp@ercot.comnomcrhelp@ercot.com Test environment requires a valid digital certificate (production or nodaltest) -Digital certificates are to be coordinate with your company’s USA -Include in email: Employee Name- TSP/Company Name- DUNS- Email address- Alternate/Centralized Email address for status change- Primary phone- Alternate phone-

24. http://nodal.ercot.com 24 Open Issues / Responses How can I configure Citrix to allow me to export/import CIM files? Steps: 1)While Citrix and the application are open, there should be a Citrix icon in your taskbar (the ‘Citrix Connection Center’) 2)Double click the icon 3)Click ‘File Security’ 4)Click ‘Full Access’

25. http://nodal.ercot.com 25 NMMS Access on Aug 31, 2009 TSP TML 1)NOMCRs / SAMRs (Report Explorer) 2) CIM network file download capability 3)NMMS Production (also SOTE / MOTE) (links to Citrix Gateway) Citrix Gateway NMMS Production (also SOTE / MOTE) Each TSP Company Folder will contain all Network Model Changes Daily zip files

26. http://nodal.ercot.com 26 NMMS Access on Aug 31, 2009 https://tml.ercot.com

27. http://nodal.ercot.com 27 SEM Go-Live transition summary –Transition periods: June 1- Aug 30, 2009 (Minimize Service Requests during this period) –Submit changes as far in advance as possible –No equipment name changes (defer until after SEM Go-Live 8/31/09) Aug 15-30, 2009 (emergency Service Requests only) –Two weeks no submissions, except for emergency changes Aug 31, 2009 - Feb 2010 (NOMCRs submissions) –Initially the NOMCR timeline will align with zonal timeline »30-day lead-time, compliant with current zonal database schedulezonal database schedule »Status is tracked and communicated via system emails –After 8/31/09 TSPs will work to validate the network model and align to their in-house systems –Any SRs that did not go into zonal production were converted by ERCOT to NOMCRs for verification/submission by TSPs in Sept –In 2010 TSPs gradually transition to NodalProtocols(3.10) 90-day timeline submission requirements