1. Open Access Technology International, Inc.
WECC Interchange Tool (WIT) Overview
for
WECC Board of Directors
December 7, 2007
“Your Energy, Our Solutions”
Proprietary and confidential. Do not copy or distribute without permission from OATI - © OPEN ACCESS TECHNOLOGY INTERNATIONAL, INC.

2. Open Access Technology International, Inc.
Trade Secret
This document and attachments contain confidential and proprietary information of Open Access Technology International, Inc. This information is not to be used, disseminated, distributed, or otherwise transferred without the expressed written permission of Open Access Technology International, Inc.
Proprietary Notice
All OATI products and services listed are trademarks and service marks of Open Access Technology International, Inc.  All rights reserved.
Proprietary and confidential. Do not copy or distribute without permission from OATI - © OPEN ACCESS TECHNOLOGY INTERNATIONAL, INC.

3. WIT Project Overview
The WECC Interchange Tool (WIT) is a WECC solution providing Interchange Authority (IA) functions for the Western Interconnection. The Project is divided into three phases for implementation
Phase I:
Single E-Tag authority for WECC
Enhanced E-Tag validation for WECC
WECC Registry based on NERC TSIN SRD
E-Tag based Balancing Authority (BA) Net Scheduled Interchange (NSI) calculations and reports
EIDE API
Production Cutover January 24, 2007
Proprietary and confidential. Do not copy or distribute without permission from OATI - © OPEN ACCESS TECHNOLOGY INTERNATIONAL, INC.

4. WIT Project Overview Phase II: BA Net Actual Interchange (NAI)
BA Inadvertent Interchange (II) calculation
Provide NERC II reporting
Production Cutover October 17, 2007
Phase III:
Ramped NSI minute values for BA’s AGC
Estimated Completion February 2008
All Phases have met specification requirements on time and on budget.
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5. WIT System Overview WECC Registry OATI Tagging WIT Interface WIT EIDE
Adjacency Definitions
Approval and Notifications
OATI Tagging
WECC Tag Authority Service
Frontend Tag Validations before creation
WIT Interface
Tag based Schedules
Net Checkouts
Reporting
WIT EIDE
PutMeter
PutSchedule
GetSchedule
Includes:
Production Systems
Development Systems
Hot-Standby System
Disaster Recovery System
Proprietary and confidential. Do not copy or distribute without permission from OATI - © OPEN ACCESS TECHNOLOGY INTERNATIONAL, INC.

6. WIT– Interchange Summary
Adjacent Nets (Schedule & Actual) , GCA/LCA Nets, Path Nets
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7. WIT Performance to Date
WIT Contract No Single Point of Failure
The WIT system must be fully redundant, including at least dual internet connections using separate providers. The WIT system must be configured in either a parallel or hot standby configuration unless otherwise mutually agreed upon between WECC and OATI
WIT Contract Availability
WIT availability will be 99.0% measured over a rolling 30-day period. The 99.0% availability requirement will apply only to WIT elements that are not part of OATI’s Authority Service. The Authority Service will comply with NERC availability requirements for Authority functions
NERC E-Tag Specification
99.5% availability per WEQ-004
WECC Registry, WIT and OATI Tag Authority Service all far exceed these minimum requirements.
640 System Users
Proprietary and confidential. Do not copy or distribute without permission from OATI - © OPEN ACCESS TECHNOLOGY INTERNATIONAL, INC.

8. WIT – Schedule Creation
Proprietary and confidential. Do not copy or distribute without permission from OATI - © OPEN ACCESS TECHNOLOGY INTERNATIONAL, INC.

9. WIT – Tie Data Upload
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10. WIT Project – BA Tie-Data Transfer Status
As of :
Providing Production Data
GCPD – Production up and running now
LDWP – Production up and running now
NWMT – Production up and running now
PGE – Production up and running now
PSCO – Production up and running now
SCL – Production up and running now
BCTC – Production up and running now
AVA – Production up and running now
AESO – Production up and running now
CHPD – Production up and running now
IID – Production up and running now
SRP – Production up and running now
SPPC – Production up and running now
NEVP – Production up and running now
WALC – Production up and running now
PNM – Production up and running now
AZPS – Production up and running now
TEPC – Production up and running now
EPE – Production up and running now
IPCO – Production up and running now
BPAT – Production up and running now
PACE – Production up and running now
PACW – Production up and running now
DEAA/GRMA/HGMA – Production up and running now. (Only Providing Data Once a Day - needs to be hourly)
TIDC – Working on implementation.  (Manually uploading data currently - hourly)
DOPD – Production up and running now
SMUD – Production up and running now
WACM – Production up and running now
CISO – Working on implementation (Manually uploading data currently - once a day)
CFE – Production up and running now
PSEI – Production up and running now
Not Providing Data
TWPR – Working on implementation
WAUW – Working on implementation
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11. WECC Registry – Adjacency Summary
Proprietary and confidential. Do not copy or distribute without permission from OATI - © OPEN ACCESS TECHNOLOGY INTERNATIONAL, INC.

12. WECC Registry Statistics
Proprietary and confidential. Do not copy or distribute without permission from OATI - © OPEN ACCESS TECHNOLOGY INTERNATIONAL, INC.

13. WIT Project – Future Enhancement Ideas
Unified WECC Time Error Correction Calculation
WECC Reserve Requirement Calculator
Provide “Real-time” Nets for System Security Analysis
WECC Path OTC Management and Monitoring
Additional Tag Validations
Explicit Path Adjacency
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14. WIT Project Contacts WECC Point of Contact Eric Langhorst (WECC)
ESWG Project Team (Phase II)
Mark Hackney, for general questions (AZPS)
Jim Hansen, for EIDE questions (SCL)
OATI Contact
Mark Nielson, for technical questions (OATI)
Proprietary and confidential. Do not copy or distribute without permission from OATI - © OPEN ACCESS TECHNOLOGY INTERNATIONAL, INC.

15. Open Access Technology International, Inc.
Questions?
“Your Energy, Our Solutions”
Proprietary and confidential. Do not copy or distribute without permission from OATI - © OPEN ACCESS TECHNOLOGY INTERNATIONAL, INC.