Retail Market Subcommittee Update to TAC July 7, 2005

Voting Items Agenda SCR 742 – Automated Retail Transaction Verification and Impact Analysis (Remand from June Meeting) RMGRR 024 – Texas Test Plan Team RMGRR 025 – Retail Customer Transition Business Process

Voting Item – SCR 742 Automated Retail Transaction Verification Developed by the Texas Test Plan Team to support automatic testing of retail transactions. Allows market participants automated testing to verify internal system changes that do not require complete market testing. Reduces the effort required to complete certification testing. Improves the ‘time-to-market’. Will not replace a thorough end-to-end market testing.

Voting Item – SCR 742 Automated Retail Transaction Verification History Voted on by RMS April 12, 2005. Sent to PRS for prioritization. Prioritized by PRS 2.3. Remanded back to RMS by TAC June 2, 2005. Approved a revised RMS Recommendation Report, June 15, 2005. Enhanced overall Market benefit, Market impact and Consumer impact. Note: Maintained PRS priority recommendation - 2.3

-- Voting Items – RMGRR 024 RMGRR 025 Texas Test Plan Team Describes the current Texas Test Plan Team role and responsibilities. RMGRR 025 Retail Customer Transition Business Process Clearly States the Role of the PUC to be consistent with current Market practices Works in a cooperative manner to establish processes and procedures for testing the Market Participants commercial operations to verify retail system compliant with ERCOT Protocols and PUC rulemaking. Develops processes and procedures for testing that represent the consensus view of Market Participants directly involved in the testing process. Evaluates market processes defined by the ERCOT Protocols, other RMS working groups, and PUC rulemakings to establish testing requirements and materials necessary to validate those processes among Market Participants.

Customer Transition Timeline QSE representation ends ESI IDs provided to POLRs, begin submitting transactions QSE Notice Transition completed REP must post collateral Load becomes UFE Customer Transitions, 24 Days UFE TDSP Lost Revenue 05/05 05/09 05/11 05/12 05/13 05/16 05/17 06/01 06/09 Filed for REP Decertification Daily checkpoints begin 99.4% of ESI IDs scheduled

??? Questions