1. Retail Market Subcommittee June 9, 2010 Performance Measures 1st Quarter 2010 Transaction Comparison

2. Reporting Issues Taken from Page 3 – Attachment A 02 – Analysis of Performance Measures Report 1Q 2010 A reporting issue is an issue with the reporting tool, Electronic Transaction System (ETS). There is no impact with the transactions being sent to the Market Participants. Reporting Issue 1 There first reporting system issue this quarter was a missed reporting impact relating to the Expedited Switch resulted in protocol calculations that were inaccurate for the Switch 814_06 (Scheduled Notification). The protocol calculation was not changed in the ETS system. The calculation expected the 814_06 to be sent five days prior to the scheduled date. The process creates the transaction two days prior to scheduled date. Each 814_06 was calculated as being out of protocol due to this reporting system issue. This reporting issue was corrected with Emergency SIR 12518. The SIR was implemented on February 17, 2010. Manual calculations were made at the market level and are used in this quarter’s reports. The impact was in figures reported in both January and February. Reporting Issue 2 As part of the analysis process, the number of 814_06 transactions reported appears to be low and could be a potential issue. On-going analysis is being conducted to determine the accuracy of the 814_06 count in the reporting tool. This issue potentially impacts Switch, Standard Move-In and Priority Move-In 814_06 (Scheduled Notifications to losing CR). The percentage in protocol for the counts reported are correct. The issue is currently under analysis. 2

3. Variance Explanation 3 Processing Issue 1 System changes implemented on January 23 resulted in EDI transactions that were not able to be processed by market participants. A roll-back of the code and reprocessing of transactions resulted in transactions being out of protocol. This was most noticeable in the Standard Move-In business process 814_06 (Schedule Notification) transactions. Processing Issue 2 On March 1st, one market participant submitted over ten thousand 814_26 (Historical Usage Request) transactions. This is much higher than the normal volume. The resulting 867_02 Historical Usage transactions being forwarded impacted not only the 814_26 (Ad Hoc Historical Usage Requests) but those Historical Usage Requests included in the 814_01 (Switch), 814_16 (Standard Move-In and 814_16 (Priority Move-In) transactions. The resulting 867_02 (Historical Usage) transactions have a four hour turn around timing that resulted in a backlog and required longer than the four hours to clear all the files through the system. Processing Issue 3 The 814_06 Sent Pending (Schedule Notifications) transactions are to be sent by 6:00 a.m. On March 9th, batch processing was not completed until 7:37 a.m. resulting in 1,400 Standard Move-In notifications being out of protocol.

4. 4 Switches PUC #36141 Performance Measures Retail Market Subcommittee Q1 2010Q4 2009 Transaction Qty% % 814_01 194,756-175,758- 814_02 12,964100%12,746100% 814_03 181,772100%162,928100% 814_04 184,434100%163,633100% 814_05 180,415100%163,055100% 814_06 147,86298%132,703100% 814_07 121,10499%121,14699% 867_02 Received 186,11598%162,07999% 867_02 Sent 186,11499%162,040100% 867_04 Sent 170,585100%162,766100%

5. 5 Standard Move-In PUC #36141 Performance Measures Retail Market Subcommittee Q1 2010Q4 2009 Transaction Qty% % 814_16 432,825- 450,420- 814_17 3,68999%9,550100% 814_03 429,009100%441,316100% 814_04 426,935100%436,557100% 814_05 420,969100%434,82499% 814_06 205,98699%156,18399% 814_07 187,85699%194,56099% 867_02 Received 387,63699%375,82298% 867_02 Sent 387,63199%375,616100% 867_04 Sent 393,115100%421,827100%

6. 6 Priority Move-In PUC #36141 Performance Measures Retail Market Subcommittee Q1 2010Q4 2009 Transaction Qty% % 814_16 154,234-132,136- 814_17 2,850100%4,12399% 814_03 151,35299%127,91099% 814_04 152,026100%127,287100% 814_05 149,053100%126,84899% 814_06 74,680100%58,837100% 814_07 60,03798%50,47999% 867_02 Received 148,59397%118,47899% 867_02 Sent 148,58999%118,421100% 867_04 Sent 139,826100%118,304100%

7. 7 Move-Out PUC #36141 Performance Measures Retail Market Subcommittee Q1 2010Q4 2009 Transaction Qty% % 814_24 Received 346,067-364,652- 814_24 Sent 239,161100%253,608100% 814_25 Received 240,865100%254,759100% 814_25 Sent 343,868100%364,370100% 867_03 Received 294,917-342,150- 867_03 Sent 294,734100%341,203100%

8. 8 ESI ID Create/Maintain PUC #36141 Performance Measures Retail Market Subcommittee Q1 2010Q4 2009 Transaction Qty% % 814_20 Create 34,277-31,988- 814_21 Create 34,096100%31,843100% 814_20 Maintain 1,014,263-1,189,611- 814_21 Maintain 1,026,886100%1,184,668100%

9. 9 Questions?