12/20/2019

1. Cut-Over Milestones 12/20/2019 Market Readiness Seminar

2. Cutover Update • Cutover Tasks Complete • (08/13) Registration Deadline for CRRAH to participate in December CRR Monthly Auction (Protocol 16.8.2) • (08/16) ERCOT releases Outage Scheduler to Market • TSPs/QSEs can enter outages in Outage Scheduler via Web Service or UI • TSPs/QSEs are responsible for verifying outages imported to Nodal Systems and correcting any missed/incorrect outages by 09/17/2010 • (09/01) Network Model Go-Live (Protocol 3.10 ) • (09/02) Begin interim update process for Network Model Changes • From 09/02 forward until Go-Live any Model changes submitted to ERCOT prior to Go-Live will leverage the interim update process.   • (09/01) CRR Activity Calendar to MIS • MPs can retrieve the CRR Activity Calendar from MIS public with a valid Digital Certificate Market Readiness Seminar

3. Cutover Update – Upcoming Activities • Next 2 Weeks • (09/08) Deadline for PCRR NOIE Contract Eligibility • (09/17) Outages are synched between Zonal and Nodal . • Market Participants maintain synch of outages between Zonal and Nodal systems thru 12/02 (dual entry) • Next Month Summary • (CREDIT) • ERCOT assesses each CPs credit worthiness for the Dec CRR Auction • ERCOT posts ACLs daily for CRR December monthly auction to CRR • CRRAH able to retrieve ACLs from CRR system each business day. • MPs can post additional collateral until 11/08/2010 for Dec 2010 CRR Auction • (CRR) • ERCOT begins accepting PCRR Nominations for December Monthly Auction • ERCOT shall allocate PCRRs to NOIEs for the 2010 December Monthly Auction and publish to MIS • ERCOT shall post CRR Network Model for the 2010 December Monthly Auction to MIS • ERCOT to post December 2010 Monthly Auction Notice to MIS Market Readiness Seminar

4. Cutover Update – Upcoming Activities • Next Month Summary Cont’d • (OUTAGES) • December Outages pulled for CRR Network Model (for PCRR Allocation) • (NETWORK MODEL) • Network Model built for CRR Allocation and Auction • Network Operations Model posted to TSP Citrix location and TSPs begin validation process • (ERCOT) • ERCOT begins test data clean up from Market Trials • CRR Test Data • ERCOT performs MIS backend reconfigurations (10/03/2010 – 10/11/2010) • Market Participants will not have access to the MIS UI and EWS Get Reports functionality. • Market Participants will need to use the direct links (listed on next slide) or Citrix to access system applications. • All other EWS will be left on and from 10/1 up until the First Run Date as defined in EMIL of the CDR report, the EWS will return ‘no reports found’ during that time. • MIS UI and EWS Get Report Go-Live (10/12/2010) • Postings will be made available based on the EMIL posting date going forward • Postings live prior to 10/12/2010 will continue to be made available at this time. • Market Participants will only have access to go-live posting data. Data from Market Trials activities is no longer available for download. Market Readiness Seminar

5. Cut-Over – MISUI and EWS Get Report Reconfiguration Details URLs to be used during cutover activities in October: • Network Model via Citrix: • https://gateway.ercot.com/vpn/index.html • Market Manager User Interface: • https://mis.ercot.com/mmsui/mmsui/displayTradesLanding.action • Outage Scheduler Application: • https://mis.ercot.com/osrui/osrui/Summary.action • CRR Application (MUI): • https://mis.ercot.com/crr/mui/ListAllUserMessage.do - direct link for CRRAHs • https://mis.ercot.com/crr/mui/editSMPCreditLimit.do - direct link for CPs • Web Services Endpoint URL: • https://misapi.ercot.com/2007-08/Nodal/eEDS/EWS Market Readiness Seminar