1. August 25, 2008 TPTF Nodal Status Report: Integrated Schedule Update Change Control Update Adam Martinez Troy Anderson

2. 2 2 Nodal Status Report - Integrated ScheduleAugust 25, 2008 Agenda Integrated Schedule – Key Dates Remaining vendor software releases Change control update

3. 3 3 Nodal Status Report - Integrated ScheduleAugust 25, 2008 TPTF Requests for the Integrated Schedule A clear, achievable delivery date ERCOT wait until the EMS CIM Importer is thoroughly tested before committing to a new "go-live" date Implementation will include both the Real-Time Market and the Day-Ahead Market, as originally planned ERCOT review incorporating deferred items for the Dec. 1 date Sufficient testing time for TSPs and QSEs is needed in the new "go-live" date Sufficient time to validate the network operating model for TSPs ERCOT provide a draft of the new integrated schedule to TPTF for review and comments

4. 4 4 Nodal Status Report - Integrated ScheduleAugust 25, 2008 Nodal Integrated Schedule – Key Dates ActivityDate Present to ERCOT executivesAug. 27 Present to TPTF and incorporate feedbackSep. 8 Present to TAC and incorporate feedbackOct. 2 Present to TPTFOct. 13 Present to Board of Directors and incorporate feedbackOct. 21

5. 5 5 Nodal Status Report - Integrated ScheduleAugust 25, 2008 NMMS – Remaining Software Releases NMMS 4A – August 25, 2008 (required for SEM Go-Live) –Model On Demand (required for Planning) NMMS 5 – October 1, 2008 (required for SEM Go-Live) –Production Model business process and workflow –Reports NMMS 6 – December 19, 2008 (required for SEM Go-Live) –Bug fixes and User Interfaces for Model Coordinator NMMS 7 – post 12/31/2008 (not required for SEM Go-Live) –Auto Model Scheduler Data Validation (supports Outage Scheduler and Outage Evaluation)

6. 6 6 Nodal Status Report - Integrated ScheduleAugust 25, 2008 MMS – Remaining Software Releases MMS 4, Patch 4 scheduled for delivery to ERCOT in late August –Partial implementation of NPRR 102 –Bug fixes MMS 4, Patch 5 scheduled for delivery to ERCOT at end of September 2008 (tentative) –Code changes for CIM integration and bug fixes for Settlements integration –final patch scheduled for MMS4; delivery added to ensure progress is made while waiting for CIM MMS5 is the last scheduled release of functionality, targeted for delivery to ERCOT in late Jan 2009; dependent on synchronized CIM file Additional monthly patch releases are planned to fix any defects that are identified during subsequent testing efforts

7. 7 7 Nodal Status Report - Integrated ScheduleAugust 25, 2008 EMS – Remaining Software Releases EMS 5.1.5 - August –Outage Evaluation (OE) – Testing at ERCOT (Post-FAT bug fix phase) –Voltage Support (VSS) – Testing at ERCOT (Post FAT bug fix phase) –Alerts and Notification along with the MMS-EMS Interface –Bug fixes EMS 5.1.6 - September / October –EMS Habitat upgrade –EMS CIM Importer – still testing at AREVA –Bug fixes Other drops through February 2009 –Changes related to SIG papers – in analysis, Private Use Network paper reviewed by TPTF subgroup last week –Remaining interfaces (e.g., reports, replication) in progress –Bug fixes

8. 8 8 Nodal Status Report - Integrated ScheduleAugust 25, 2008 COMS – Remaining Software Releases Settlement and Billing –LodeStar 4.7 migration to Production (zonal) September 2008 –All functionality delivered by December 2008 –Subsequent defect releases as needed to support testing Registration and Disputes –Targeted production (zonal) in December 2008 Credit Monitoring and Management –Final functional delivery to ERCOT scheduled for February 2009 –Additional deliveries after March will occur to support internal requirements (not necessary for go-live)

9. 9 9 Nodal Status Report - Integrated ScheduleAugust 25, 2008 CRR – Remaining Software Releases Enhancement patch (internal to software) – Sep. 15, 2008

10. 10 Nodal Status Report - Integrated ScheduleAugust 25, 2008 Change Control Update – NPRRs Count of NPRRs By Type SourceBaselineReasonCountSum NPRRBaseline1Correction of language with no impact14 NPRRBaseline1Correction of language - impact absorbed4 NPRRBaseline1Missed requirements20 NPRRBaseline1Synchronization with Zonal PRR2 NPRRBaseline1Non-essential enhancement343 NPRRBaseline2Correction of language with no impact7 NPRRBaseline2Correction of language - impact absorbed3 NPRRBaseline2Missed requirements10 NPRRBaseline2PUCT4 NPRRBaseline2Synchronization with Zonal PRR327 NPRRPost-Baseline2Correction of language with no impact25 NPRRPost-Baseline2Correction of language - impact absorbed13 NPRRPost-Baseline2Missed requirements6 NPRRPost-Baseline2PUCT3 NPRRPost-Baseline2Non-essential enhancement5 NPRRPost-Baseline2TBD2779 NPRRRejected/Withdrawn 12 Total161 Link to spreadsheet: PostBaseline2_NPRRs_Aug_21_2008

11. 11 Nodal Status Report - Integrated ScheduleAugust 25, 2008 Questions?