NOTICE DATE: May 25, 2012 NOTICE TYPE: W-B052512-01 Release - Wholesale SHORT DESCRIPTION: Implementation of market-facing changes for June 2012 INTENDED AUDIENCE: ERCOT Market Participants DAYS AFFECTED: June 25 - 27, 2012 LONG DESCRIPTION: ERCOT will be implementing a number of market-facing changes in the production environment on June 25 - 27, 2012. Please see the attached spreadsheet for the description and estimate of the release date for each change. ADDITIONAL INFORMATION: ERCOT may experience intermittent service interruptions during the implementation period. The systems include, but are not limited to: * Market Participant notifications * Outage Scheduler User Interface * Market Management System User Interface * Components of the MIS may be intermittently unavailable including: * Report publishing to the ERCOT Market Information System (MIS) * Current Day Reports without retry functionality may not be rerun for the missed postings during the outage time * MIS and ERCOT.com dashboards will be intermittently unavailable * During this outage, please use the following URLs to directly access the Market Manager and Outage Scheduler: * https://mis.ercot.com/mmsui/mmsui/displayTradesLanding.action * https://mis.ercot.com/osrui/osrui/Summary.action * Components of the External Web Services (EWS) may be intermittently unavailable Information on upcoming releases can be found on the ERCOT Multi Year Project Priority List (PPL) at http://www.ercot.com/services/projects/. CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask]<mailto:[log in to unmask]>. If you are receiving email from an ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com. dh