EXHIBIT 99.166
YENDT, JOHN
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From: Fulin_A_Zhuang@calpx.com
Sent: Monday, April 10, 2000 05:17 PM
To: Robert_L_Earle@calpx.com
Cc: Paul_A_Thibodeaux@calpx.com; Seth_E_Wilson@calpx.com;
Shangyou_A_Hao@calpx.com; John_A_Rinaldi@calpx.com;
john.yendt@ps.net; Ning_A_Yang@calpx.com; trinaynee.reddy@ps.net
Subject: Re: Compliance Monitoring Unit Data Requirement --- Emergency
Service Request # 505 Status
[ATTACHMENT]
Robert,
Attached please find a data set reference showing the status of various items
that you requested. For each item ready for your review and use, a "Ready" is
indicated in the "Status" column.
The actual data is in \\csiapapp1a\compliance\dataset or its sub-folders. All
the data ready for your review and use are in CSV format with column headings.
Please let me know as soon as possible if you have any questions or comments.
Fulin
(See attached file: ESR505_DataRef1 .doc)
Robert L Earle
04/10/2000 01:08 PM
To: Fulin A Zhuang/users/PX_CALIF@PXNOTES
cc: Seth E Wilson/users/PX_CALIF@PXNOTES, Shangyou A
Hao/users/PX_CALIF@PXNOTES, John A Rinaldi/users/PX_CALIF@PXNOTES,
john.yendt@ps.net, Ning A Yang/users/PX_CALIF@PXNOTES,
trinaynee.reddy@ps.net
Fax to:
Subject: Re: Compliance Monitoring Unit Data Requirement --- Emergency Service
Request # 505 (Document link: Fulin A Zhuang)
Hi.
I've annotated the list below. Thanks for your help.
Fulin A Zhuang
04/07/2000 01:06 PM
To: Robert L Earle/users/PX CALIF@PXNOTES
cc: Seth E Wilson/users/PX CALIF@PXNOTES, Shangyou A
Hao/users/PX_CALIF@PXNOTES, John A Rinaldi/users/PX_CALIF@PXNOTES,
john.yendt@ps.net, Ning A Yang/users/PX_CALIF@PXNOTES,
trinaynee.reddy@ps.net
Subject: Compliance Monitoring Unit Data Requirement --- Emergency Service
Request #505
Robert,
1
I want to confirm once more with you on what data you would need for the MMC
meeting towards the end of April. These data items are listed below, in the
order of priority provided by you:
1. Dayahead energy bid curves by portfolio as well as aggregated to the
participant level
2. Day-Of or hourahead energy bid curves by portfolio as well as aggregated to
participant level and aggregated to market level.
3. Day ahead unconstraint PX energy market clearing prices and quantities
4. Day-Of unconstraint PX energy market clearing prices and quantities
5. Day-Ahead Initial Preferred Schedules, at resource level and aggregated to
participant zonal supply and participant zonal demand leves
6. Day-Of or hourahead initial preferred schedules, at resource level and
aggregated to participant zonal supply and participant zonal demand levels
7. Day-Ahead energy zonal market clearing prices and quantities
8. Day-Of or hour-ahead zonal market clearing prices and quantities
9. Day-Ahead Final Schedules, at resource level and aggregated to participant
zonal supply and participant zonal demand leves
10. Day-Of or hourahead Final schedules, at resource level and aggregated to
participant zonal supply and participant zonal demand levels
Please e-mail me as soon as possible with your correction or confirmation.
Please do not wait over the weekend.
Thank you,
Fulin
2
CALPX CHANGE MANAGEMENT
Seth Wilson
[PEROTSYSTEMS LOGO] Compliance
SERIVE REQUEST DATA FORM (Service Request Description from Remedy)
SR NUMBER (2000-505) SME NAME: SHANGYOU HAO
<Table>
PART 1: SCOPE
SR OBJECTIVE STATEMENT COMPLIANCE DATA NEED FOR MARKET ANALYSIS REPORTS AND ANNUAL REPORTS
JUSTIFICATION Regulatory Mandate
REQUIREMENTS Provide market data as required. See Appendix for detailed data needs
REQUEST CATEGORY 3 -- Regulatory requirement
ANALYSIS CATEGORY 2 - Medium
Priority 1 - High
</Table>
STAKEHOLDER IMPACT ANALYSIS
<Table>
<Caption>
Business Unit Impact? If Yes, describe impact: Authorized by: Effort Req'd
- ------------- ------- ------------------------ -------------- ------------
Trading N (man-hours)
Settlements N
Finance N
Marketing N
Compliance Y Defined detailed requirements and Seth Wilson See Below
Obtain data sources
Regulatory N
Applications N
Operations N
</Table>
<Table>
RAID (OPTIONAL)
Risks Y Not all data sources have been identified and not all algorithms for data processing and
aggregation are available at this time
Assumptions N
Issues N
Definition N
Out of Scope N
PART 2: SCHEDULE
TIMELINE/PROJECT PLAN
(Attach project plan if necessary)
KEY MILESTONES N DATE
REQUIRED COMPLETION DATE 4/10/00 to 4/12/00 for data availability
PART 3: RESOURCES
DEVELOPMENT Data extraction, transformations: Two data base specialists: 90 Hours
Data aggregation and issue resolution: Business Analyst: 20 Hours
Project Management: 10 Hours
</Table>
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CALPX CHANGE MANAGEMENT
OPERATIONAL N
END-TO-END TESTING N
DOCUMENTATION N
SYSTEM N
FINANCIAL IMPACT Y Total hours: 120
Total cost: $19680
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