1. Page 1 ERCOT Project Status 50121, Service Oriented Architecture Project Timeline October 2004 - April 2007 Project Goals Replace SeeBeyond with TIBCO Deploy sufficient TIBCO licensing footprint to support future implementations Deploy Service Oriented Architecture (SOA)

2. Page 2 ERCOT Project Status Near-term - Delivery of 2 key sub-projects –Enterprise Integration Framework Delivery timeframe: Q2, 2005 (project delivered & closed) Goal: Purchase and install software/initial Dev environment; Identify and document ERCOT's SOA delivery methodology, infrastructure, standards and policies for TIBCO deployments; identify sub-projects for 2005 –Deployment of initial pilot project Delivery timeframe: estimated early Q4, 2005 (project underway) Small; little to no Market impact Goal: Address TIBCO integration within TML Report Explorer function; implement initial footprint in testing and production environments Mid-term - Migrate SeeBeyond components to TIBCO Delivery timeframe: remainder of 2005 into Q1, 2006 (projects underway) Will use metrics from initial project (MID) to plan out remainder of 2005 deployments via iterative “bundled” approach Goal: Migrate all SeeBeyond components by March 2006 Long-term (2006-2007) Identify 2006 integration opportunities to leverage SOA / TIBCO technology Goal: Implement TIBCO footprint within ERCOT environment to support ERCOT’s current and future needs Project: SOA Extend Footprint project on 2006 Project Priority List 50121, Service Oriented Architecture Delivery Approach

3. Page 3 ERCOT Project Status 50121, Service Oriented Architecture Sub-Component Descriptions Project #ComponentDescriptionStatusPhaseNotes 50121-01Enterprise Integration Framework TIBCO software purchase; SOA sub-project definition/delivery strategy; SOA methodology approach, standards, template documents. CompletedN/AProject delivered and closed in May 2005. 50121-02TIBCO HawkImplementation of TIBCO production monitoring software. ClosedCombined with the MID 50121-03Market Information Distribution (MID) Replacement of RMC component and SeeBeyond integration within Report Explorer functionality. ActiveExecution - iTest Initial SOA project to deliver TIBCO functionality. Delivery Scheduled December 2005 50121-04Framework Services (FS)Delivery of key underlying TIBCO framework components to support business processes. Includes: transaction registration, transaction scheduling and prioritization, business process instantiation and routing, transaction transformation response interface, exception handling, monitoring, check pointing, reprocessing tools ClosedN/AInitial framework deployed with CSA- TX 2.1 / MID Will deliver in conjunction with 50121-07. 50121-05Continuous Service Agreement (CSA) Replacement of SeeBeyond components contained within the CSA business process. CanceledN/AScope incorporated into TX SET 2.1 project. 50121-06Endpoint Services (ES)Replacement of existing SeeBeyond point-to- point integration between applications that reside outside of a Retail business process. ActivePlanningPhase 1 – Siebel to L* 1 & 2 – Delivery Scheduled for December 2005 Phase 2 – initiation 50121-07Retail Business Processes (RBP) Replacement of SeeBeyond components contained within the Move In (MVI), Maintain ESI ID (MESI), Switch (SWI), Move out (MVO), Drop to POLR (DRP), and Historical Usage (USG) business processes. ActivePlanningCannot be implemented until after TX SET 2.1 deploys in December 2005.