Information Technology Report

Trey FeltonManager, IT Service Delivery

December 2011

ERCOT Public

2 ERCOT PublicDecember 2011

Highlights

Service Availability – November met all SLAs Market Operations IT systems met all SLA targets Market Data Transparency IT systems met all SLA targets Grid Operations IT systems met all SLA targets Retail Market IT systems met all SLA targets

Other items to note

– Data Center Relocation - Retail System move from TCC1 to TCC3 • New data centers, Bastrop and TCC3, are now in full production mode

– Retail processing slowed down when MP sent 30,000 incorrectly formatted transactions (11/1)

• MP corrected issue, ERCOT may add message rejects for this issue

• Intermittent slow response for approx. 3 hours

– Daylight Savings Time (DST) issue during hour 25 on (11/7)

• Load Forecast did not process 25th hour correctly resulting in zero load forecast for SCED

• Issue was corrected, price corrections were issued

• Working through long-term issue with vendor

3 ERCOT Public

2011 November (Retail and Ops)

December 2011

99%

98%

97%

94%

95%

96%

93%

92% and below

100%

November 2011 Net Service Availability

Transaction Processing

(BH)

TML MarkeTrak Retail API

TML Report Explorer

100% 100%100% 100% 100%

CRR

100%

Retail & Market Operations

Transaction Processing ( Off BH)

100%

MIS

100%

Transaction Processing SLA Target: - Business Hours (BH): 99.9%- Off Business Hours (Off BH): 99%Texas Market Link (TML) SLA Target: 99%

MarkeTrak SLA Target: 98%TML Report Explorer SLA Target: 99%Retail API SLA Target: 99%Congestion Revenue Rights SLA Target: 98%Market Information System SLA Target: 99%

99%

98%

97%

94%

95%

96%

93%

92% and below

100%

November 2011 Net Service Availability

MMS SCED

EMS LFC

100% 100 100%

OS NMMS

100%

EMS Agg

100%

MMS Agg

100%

MMS Aggregate SLA Target: 99%EMS Aggregate SLA Target: 99%MMS SCED SLA Target: 99.93%

EMS LFC Target: 99.93% Outage Scheduler Target: 99%NMMS Target: 97%

Grid Operations

• SLAs met in November

4 ERCOT Public

2011 Summary Year to Date (Retail and Ops)

December 2011

2011 Net Service AvailabilityYear to Date

Retail & Market Operations

Transaction Processing SLA Target: - Business Hours (BH): 99.9%- Off Business Hours (Off BH): 99%Texas Market Link (TML) SLA Target: 99%

MarkeTrak SLA Target: 98%TML Report Explorer SLA Target: 99%Retail API SLA Target: 99%Congestion Revenue Rights SLA Target: 98%Market Information System SLA Target: 99%

99%

98%

97%

94%

95%

96%

93%

92% and below

100%

Transaction Processing

(BH)

TML MarkeTrak Retail API

TML Report Explorer

99.96% 99.89%99.94% 99.87% 99.83%

CRR

99.97%

Transaction Processing ( Off BH)

99.91%

MIS

99.87%

• MMS SCED below target SLA but with significant improvements over time• Other SLAs met

2011 Net Service AvailabilityYear to Date

99%

98%

97%

94%

95%

96%

93%

92% and below

100%

MMS SCED

EMS LFC

99.92% 99.98% 99.99%

OS NMMS

99.99%

EMS Agg

99.98%

MMS Agg

99.92%

MMS Aggregate SLA Target: 99%EMS Aggregate SLA Target: 99%MMS SCED SLA Target: 99.93%

EMS LFC Target: 99.93% Outage Scheduler Target: 99%NMMS Target: 97%

Grid Operations

5

2011 Trend - Retail IT Services

ERCOT PublicDecember 2011

Retail Transaction Processing (Business Hours)

Target – 99.9%

99.00%

98.00%

97.00%

94.00%

95.00%

96.00%

93.00%

92.00%

100.0%

Jan Feb MayAprMar

YTD – 99.91%

June July Aug Sep Oct Nov

Retail Transaction Processing (Off Business Hours)

Target – 99%99.00%

98.00%

97.00%

94.00%

95.00%

96.00%

93.00%

92.00%

100.0%

Jan Feb MayAprMar

YTD – 99.96%

JulyJune Aug Sep Oct Nov

Texas Market Link

Target – 99%99.00%

98.00%

97.00%

94.00%

95.00%

96.00%

93.00%

92.00%

100.0%

Jan Feb MayAprMar

YTD – 99.94%

JulyJune Aug Sep NovOct

MarkeTrak

Target – 98%

99.00%

98.00%

97.00%

94.00%

95.00%

96.00%

93.00%

92.00%

100.0%

Jan Feb MayAprMar

YTD – 99.89%

JulyJune Aug Sep NovOct

• SLAs met in November • October Retail Transaction SLA impacted by Data Center Relocation

6

2011 Trend – Market Operations IT Services

ERCOT PublicDecember 2011

Retail API

Target – 99%99.00%

98.00%

97.00%

94.00%

95.00%

96.00%

93.00%

92.00%

100.0%

Jan Feb MayAprMar

YTD – 99.87%

JulyJune Aug Sep Oct Nov

TML Report Explorer

Target – 99%99.00%

98.00%

97.00%

94.00%

95.00%

96.00%

93.00%

92.00%

100.0%

Jan Feb MayAprMar

YTD – 99.83%

JulyJune Aug Sep Oct Nov

Market Information System

Target – 99%99.00%

98.00%

97.00%

94.00%

95.00%

96.00%

93.00%

92.00%

100.0%

Jan Feb MayAprMar

YTD – 99.91%

JulyJune Aug Sep Oct Nov

• All SLAs met in November

Congestion Revenue Rights

Target – 98%

99.00%

98.00%

97.00%

94.00%

95.00%

96.00%

93.00%

92.00%

100.0%

Jan Feb MayAprMar

YTD – 99.97%

JulyJune Aug Sep Oct Nov

7

2011 Trend - Grid Operations IT Services

ERCOT PublicDecember 2011

SCED

Target – 99.932%99.9%

99.8%

99.7%

99.4%

99.5%

99.6%

99.3%

99.2%

100.%

Jan Feb MayAprMar

YTD – 99.92%

JulyJune Aug Sep Oct Nov

LFC

Target – 99.932%99.9%

99.8%

99.7%

99.4%

99.5%

99.6%

99.3%

99.2%

100.%

Jan Feb MayAprMar

YTD – 99.98%

JulyJune Aug Sep Oct Nov

Outage Scheduler

Target – 97%

99.00%

98.00%

97.00%

94.00%

95.00%

96.00%

93.00%

92.00%

100.0%

Jan Feb MayAprMar

YTD – 99.99%

JulyJune Aug Sep Oct Nov

Network Model Management System

Target – 97%

99.00%

98.00%

97.00%

94.00%

95.00%

96.00%

93.00%

92.00%

100.0%

Jan Feb MayAprMar

YTD – 99.99%

JulyJune Aug Sep Oct Nov

• MMS SCED SLA below target but improving. Hardware, software and processes improved

8

Release Management Metrics

ERCOT PublicDecember 2011

• Number of changes down from Nodal last year• Increased Releases from Data Center

Relocation

Changes

Releases

9

ERCOT Public Website Metrics

ERCOT PublicDecember 2011

Awaiting slide