NMMS Nodal Network Mgmt and Monitoring System Update TPTF Meeting August 2007 Raj Chudgar

Updating documents for Baseline 2 as needed NMMS Document Update Updating documents for Baseline 2 as needed Detailed design is in progress and should be complete by Sept 2007 Use cases and test cases have been developed and are being modified Most Test scripts are developed Installation procedures in progress (issues with installation script documented back to Siemens) Texas Nodal

ERCOT Net+ CIM ready for any MP to transfer CIM Update ERCOT Net+ CIM ready for any MP to transfer File has been sent to ERCOT vendors that require importer development ERCOT CIM will continue to be updated as AREVA data is converted to CIM format ERRCOT CIM development scheduled to be completed in 1Q2008 Legal has developed a generic NDA for MPs that are interested in obtaining the file (35 mbs zipped) Contact ERCOT wholesale client service rep for more information CIM user conference being held at ERCOT in October 2007. If your company is interested in attending please send an email to ERCOT ERCOT has noticed that many QSEs have no experience with CIM. If QSE is planning to work with vendors for CIM importer ERCOT can assist Texas Nodal

Phase 1a completed and deployed in June 2007 NMMS Solution Update Development: Phase 1a completed and deployed in June 2007 Phase 1b FAT completed in August 2007 A couple critical defects found. Siemens scheduled conference call with ERCOT to address defects this week Phase 1b will only be completed after all critical defects are solved Phase 1c FAT scheduled in September 2007 Data Management and reconciliation Settlement Price point rules drafted and list to be developed for end of August TPTF review List of Electrical Bus names being developed with TSPs presently. Scheduling to complete by end of September Data loading into NMMS in October/November 2007 Texas Nodal

Lots of work is planned for next 6 months NMMS Development completion NMMS Planning Lots of work is planned for next 6 months NMMS Development completion NMMS Training for QSE complete (4Q2007) by training group NMMS add’l training for TSPs 4Q2007 by 4Q2007 NMMS data mgmt and reconciliation complete by 3Q2007 NMMS Market testing and trials starting in 4Q2007 NMMS testing with EMS/MMS starting in 4Q2007 ERCOT has brought in temp staff to handle current ERCOT workload so that most of ERCOT network modeling staff can work on NMMS (as planned) TSPs and QSEs that are planning to use CIM data should be working on comparable solutions at this point as well Texas Nodal