1. Proposed Scope for Market Data Working Group (MDWG) MISUG December 7, 2015

2. 2 MISUG12/7/2015 Market Data Working Group MISUG has evolved since its inception in 2011 MISUG encompasses all data-related issues Proposed name change: Market Data Working Group (MDWG) MDWG will be a new group MISUG archives linked to MDWG Continuing to report to COPS The Market Data Working Group (MDWG) reporting to Commercial Operating Subcommittee (COPS) provides a forum for discussion, input and comment on issues related to ERCOT market data, including data output, data access, data accuracy, and data classification.

3. 3 MISUG12/7/2015 Scope of MDWG Data Output Data Access Data Accuracy Data Classification Target Audience: All Market Participants who would access ERCOT market data.

4. 4 MISUG12/7/2015 Topics for Consideration Data Output –Report formats –Performance/SLA –Documentation –Training Data Access –Public website – www.ERCOT.comwww.ERCOT.com Dashboards Public reports –Alerts and Notifications –MIS – used by all Market Participants Data downloads User interface applications –External Web Services (EWS) – automated access point (API) used by all Market Participants –Proposed for modification FTP – limited legacy use for Retail transaction submissions and LRS data transfers Commercial API – used by Retail Market for Find ESIID/Find Transaction

5. 5 Topics for Consideration (con’t) Data Accuracy –Report corrections –Report enhancements Data Classification –Public –Secure –Certified –Digital certificates MISUG12/7/2015