WECC Glossary Rachel Sherrard RPIC Meeting April 28, 2009

Current Glossary Contains WECC and NERC definitions, even when the definitions are the same or very similar Issues Stakeholders must use the NERC definition when creating or complying with standards, so having both definitions in one document causes confusion WECC is not notified when NERC definitions change, so NERC definitions in the WECC glossary can be outdated WECC glossary has never been through a formal review by a WECC committee or the WECC Board of Directors 2

Status – February 19, 2009 Glossary under review as part of WECC Web site redesign Definitions of NERC-defined terms have been removed (123 in total) and a link to the NERC glossary provided (example on next slide) Definitions that remained were unique to WECC and the subject of current internal review Entire glossary - review and approval by RPIC Subsequent to RPIC approval - present to WECC Board for approval and sign off 3

Current Status Glossary broken out into three sections: NERC terms (123) - with links to the NERC glossary WECC terms (127) - contained in existing glossary WECC staff reviewing and establishing which terms should remain and whether the definitions have been through due process WECC terms (144) - capitalized in WECC standards but with no definition in the existing WECC glossary WECC staff reviewing which terms should be added 5

WECC Glossary – Proposed Process Going Forward RPIC will discuss an approval process for terms that have not been through due process – April meeting Approval of all glossary terms should be completed by the end of 2009 RPIC will ask the Joint Guidance Committee to take ownership of the glossary after all current glossary terms are approved 6

WECC Glossary – Proposed Process Going Forward Glossary reviewed annually New terms defined through the NERC standard development process will be added with a link to the NERC glossary New terms defined through the WECC standard and regional criteria development process will be added to the WECC glossary Any other new terms will be subject to internal review and approval by JGC JGC will present to WECC Board for approval and sign off 7

Questions Rachel Sherrard Director of Communications Western Electricity Coordinating Council