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Enhanced Day-Ahead Commitment Detailed Design (SE-73)

​The IESO Board of Directors approved proceeding with the development of an Enhanced Day-Ahead Commitment (EDAC) system on September 5, 2008.

A core objective of this plan is to provide affected stakeholders with the opportunity to identify operational and settlement issues with respect to EDAC processes and systems, in order to minimize potential adverse impacts.

This initiative will involve market participants that enter bids and offers into the market as they will be directly affected by the implementation of EDAC - including generators, importers and exporters who transact through the submission of bids, offers and schedules.

Stakeholder Engagement Plan
Stakeholder Engagement Plan (Revised: April 29, 2010)
Stakeholder Engagement Plan (Final: August 13, 2010)
Terms of Reference for design working groups

For more information on this stakeholder initiative, email stakeholder.engagement@ieso.ca.

Schedule of Activities


Supporting Material

Expected Actions

​November 2011​Consultation closed

November 24, 2011

Final Evaluation of Stakeholder Engagement Effectiveness

October 13, 2011

IESO Enhanced Day Ahead Commitment Successfully Launched

October 7, 2011

EDAC Settlements external review report


September 30, 2011

Workshop Invitation - Preparing for Enhanced Day-Ahead Commitment Process (DACP) Participation

August 18, 2011
EDAC External Review

Day-Ahead Calculation Engine (DACE) external review report


June 11, 2010

Status updates from IESO staff.
Stakeholder input as needed

May 13, 2010


April 29, 2010

Feedback from stakeholder due by May 7, 2010

January 28, 2010

Post and communicate new stakeholder engagement plan for market facing elements of the I.T. Build portion (SE-87). Stakeholder engagement on the detailed design is now complete and the build and test phase will be the subject of SE-87

Stakeholders to provide written feedback by February 4, 2010

January 21, 2010

EDAC Update

Q4, 2009

Update Stakeholder Engagement Plan

Stakeholder feedback on revised plan

December 3, 2009

Enhanced Day Ahead Commitment Project Update

April through December 2009

Draft Market Rules sent to Technical Panel

Technical Panel to review draft Market Rules through the Rules Amendment Process

April through September 2009

Design Working Group meetings

  • Operations Design Working Group
  • Settlements Design Working Group
  • EDAC Combined Cycle Plants

Dialogue - Stakeholders to provide input

August 26,2009

Update to the Stakeholder Advisory Committee

June 2, 2009

Update on initiative provided at June 2 Dispatchable Load Working Group meeting

April 8, 2009

Stakeholder Meeting on Combined Cycle generation

Additional materials supplied after meeting

Stakeholder Feedback

Dialogue - Stakeholders to provide input

March 31, 2009

Enhanced Day Ahead Commitment meeting for both Operations and Settlement design working groups

Stakeholder Feedback

Training to bring all members to same level of knowledge

March 13, 2009

Post final Stakeholder Engagement Plan along with members of support groups

Stakeholders to provide written feedback

March 10, 2009

Presentation to IT Standing Committee Meeting

Dialogue - Stakeholders to provide input

February 19, 2009

Post and communicate Stakeholder Engagement Plan for comments

Stakeholders to provide written feedback

Solicit representatives for the support groups