1 TDTWG Update to RMS Tuesday February 3, 2015

2 Primary Activities Elections 2.ERCOT System Outages and Failures 3.MarkeTrak Performance 4.Discussed 4 th QTR Performance Measures 5.Discussed 2015 SLA 6.ERCOT Internet Explorer 7.ERCOT Test Environment 8.NAESB Updates 9.TDTWG 2015 Goals 10.Ad Hoc items

Elections Chair – Isabelle Durham, CenterPoint Energy Vice Chair – Monica Jones, NRG Vice Chair – Jim Lee, AEP 3

2. ERCOT System Outages and Failures TDTWG used month updates as presented at RMS and COPs to discuss with MPs. All SLA targets met for the month of November and December /9/14 - Retail Market planned maintenance outage with no issues to report 11/17/14 - MarkeTrak API and GUI degradation due to an application issue 12/15/14 - FindESIID and FindTransaction intermittent response for 3 Market Participants due to an application is 4

Market Data Transparency experienced delays in posting various reports. o 11/ Missing intervals for 5 reports due to a database issue o 12/15/14 - ERCOT discontinued publishing the 48 Hour Highest Price AS Offer Selected report because it may have inadvertently revealed Protected Information. January 2015 o 1/25/15 – Planned maintenance outage February 2015 o 2/28/15 to 3/01/15 – Retail Release o SLA exception may be necessary due to additional time needed on Saturday, 2/28/15 5

3. MarkeTrak performance ERCOT presented at RMS, SLO for the month of November were met and December 2014 missing SLO for API update. API update – experienced an issue with tool in the month of December 2014 ERCOT and the MTTF agreed that no changes will be made at this time to the SLOs in the 2015 SLA document API update response level still slow. Conference Call scheduled for January 9, 2015 to discuss queries used 6

Exceptions ERCOT will update and communicate release and outage expectations via the stakeholder process. Changes or postponement to release dates require a 45 day notice. Cancellation of release dates requires a minimum 10 day notice. If the timeframe between a TDTWG meeting where an exception is requested and the subsequent RMS meeting is greater than the required 15 days, an vote will be requested of RMS to address the exception request. TDTWG/MPs has requested if the timeframe between TDTWG and RMS meeting is greater than the required 15 day to be 20 days, an vote will be requested of RMS to address the exception request. 7

4. 4 th QTR performance Performance measures not ready to post but will be presented at the Feb 2015 TDTWG meeting. 8

5. D iscussed 2015 SLA As presented at RMS, TDTWG and MPS discussed proposed changes for 2015 Review under Section Service Availability Release Window: schedule change to 6 planned releases per year Updated weekend release schedule (7:00pm Saturday - 12:00am Monday) 9

6. Discussed ERCOT Internet Explorer ERCOT provide details at RMS on January 6, Roadmap includes IE 8 support – any changes to the roadmap ERCOT will provided advance notice. Testing all applications to determine what functionality does & does not work in “compatibility mode” and is expected to continue through 2015 Q1. Any functionality that does not work in “compatibility mode” will be addressed and coordinated with ERCOT’s project and release schedules Will IE 9 be supported? and When can the IA be expected? 10

7. ERCOT Test Environment TDTWG and MPs will review and discuss the business case document and make edits at the Feb. 10, 2015 meeting" 11

8. NAESB Updates Request for additional placeholders is being reviewed to be added to the NAEB standards. NAESB meeting scheduled – February 24,2015. Further discussion in TDTWG meeting, February 10 th to discuss drafting the System Change Request and plan outline with the expectation providing more details to RMS March meeting. 12

9. D iscussed TDTWG 2015 Goals Posted to TDTWG website 13

10. Ad Hoc items No other additional items discussed. 14

15 Thank You