Market Participant Readiness

IESO Reports Impacted by MRP

The changes to come from the Market Renewal Program (MRP) will introduce new reports and update existing reports to reflect the renewed market. These changes will apply to both public and confidential reports. The complete list of market facing reports impacted by MRP can be downloaded and includes target timing for posting schema and sample files. To assist market participants in preparing for these changes, the IESO is publishing the schema, sample and help files for the new and revised IESO reports. Market participants are recommended to verify that they can view and download these reports, and confirm that the structural changes in these files can be accepted by their internal processes and systems before MRP Go-Live. The table below provides a list of schema, sample, and help files so far that market participants can view and download for market facing reports. Please note that the timing for posting schema, sample, and help files for market facing reports are subject to change.

• Complete list of market facing reports impacted by MRP (updated as of March 20, 2025)
• Document_r1.xsd - Document_r1.xsd is a schema file that is created to validate the header content for all IESO reports such as Document revision number and document title. Please ensure that Document_r1.xsd is included with all IESO reports along with the report’s specific schema and sample files.
  

Quick Take: Changes to Reports Site

The purpose of the Quick Take: Changes to Reports Site is to inform stakeholders on the changes to the folder structure of the IESO Reports Site as a result of reports being introduced, updated, or decommissioned by MRP.

Reason for Update

As of March 20, 2025, the complete list of market facing reports impacted by MRP has been updated. The following changes were made:

• The Monthly Load Forecast Deviation Adjustment Estimates Report was introduced in response to stakeholder feedback from LDCs to assist them in completing their required reporting of RPP claims. The schema, sample, and help files for this report were made available in Q4 2024.

• The Hourly Uplift and Intertie Guarantee Estimates Report was previously identified as being “revised for content”. This report will be retired on MRP Go-Live. This discretionary report had very little usage and requires significant changes to capture the new and retired settlement charge types for MRP.