Information Technology Report Dave Pagliai Manager, IT Support Services February 2016 ERCOT Public

2 February 2016 Incident Report Highlights Service Availability – December MarkeTrak IT systems met all SLA targets XRetail Transaction Processing (core hours) – 98.64% (99.9% target) Incidents & Maintenance – December  12/30/15 – NAESB Issue o ERCOT was unable to successfully send Retail Registration Transactions (Move Ins, Move Outs, Switches) from approximately 06:00 until 10:45 o 997 Acknowledgements and 867 Usage Transactions were unaffected Service Availability – January Retail Market IT systems met all SLA targets Incidents & Maintenance – January  01/31/16 – Planned Maintenance (Commercial Systems Site Failover – Retail Processing, MarkeTrak)

3 MarkeTrak Performance ERCOT PublicFebruary 2016

4 Improvements initiated in response to the February 17 th duplicate retail transactions incident Goal: Migrate functionality to new platforms and retire legacy toolset –Current Status: Complete - New outbound transaction flow monitor designed to alert when a five to ten minute transactional backlog exists Complete - End-to-end pulse functionality monitoring for retail transactions –Total inbound and outbound files monitored at the NAESB proxy using a data analytics tool Complete – Migrate monitoring functionality to a supported toolset –84 of 84 monitors complete –19 of 19 directory monitors complete –11 of 11 reports complete –112 of 112 dashboards complete –3 of 3 business functions complete Legacy Tool Migration Update February 2016ERCOT Public