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Market Maintenance Activity

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Texas Market Link(PRP Phase 1)

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IT Update – Texas Market Link(Portal Replacement Project Phase 1)

• Status:– Texas Market Link (TML) was launched in parallel on May 3rd – Issues to report:

• As of June 1 there are no significant issues.– Market usage:

• As of June 1 TML is handling 15-25% of the daily “portal” traffic• Being accessed by 60+ Market Participants (30REP, 30QSE)

• Next Steps:– Planned Outage:

• Working with Client Relations to determine timing of planned outage of Top-Tier Portal to surface any Market issues prior to end of parallel.

– De-commissioning TopTier Portal (https://portal.ercot.com)• TML and Top-Tier Portal platforms planned for parallel until July 1, 2004

to allow for transition period of market users and interfaces.• Client Relations will send notice to Market advising of decommissioning

of https://portal.ercot.com. The planned dates of service are:– May 3-July 1: https://tml.ercot.com and https://portal.ercot.com– 1 day TBD: planned outage of https://portal.ercot.com– July1-forward: https://tml.ercot.com

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Thank You

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Retail Market Guide

Changes/Updates Procedures

Brief overview in support of RMGR-2004_006

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Retail Market Guide

• RMS approved changes/updates to Retail Market Guide will be made quarterly

– 1st quarter ending March 31st

– 2nd quarter ending June 30th

– 3rd quarter ending September 30th – 4th quarter ending December 31st

• Retail Market Guide website updated to include link to Retail Market Guide Change Control Form for downloading

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Retail Market Guide

Location of Retail Market Guide Change Control Form http://www.ercot.com/Participants/Committees/rms_comm.htm

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Retail Market Guide

• Email address established for submission of changes/updates (RMGChangeControl@ercot.com)

• ERCOT staff will monitor change/update requests to the RMG

• Submitted change requests to the RMG will be presented to RMS for review and possible action

• Approved changes will be incorporated into the RMG as a redlined version until TAC and the ERCOT Board have approved the RMG at the end of the quarter

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Retail Market Guide

• Updates to the RMG may occur outside the normal quarterly update process in the event of a PUCT directed market change. These updates will also require RMS, TAC and ERCOT Board approval, respectively

• Retail Market Guide Change Control Form has also been revised to include a change control manager monitoring section

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Retail Market Guide Change Control Form

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Retail Market Guide Change Control Log

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RMGR – 2004_006

Review for approval by RMS

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Thank You