California ISO - Day-ahead market enhancements

Proposal Development	Decision	Implementation	Completed/Closed
Jul 11, 2023 Revised draft tariff language posted May 01, 2023 Revised final proposal posted	Dec 20, 2023 FERC approval (ER23-2686) Aug 22, 2023 Tariff amendment (ER23-2686) May 17, 2023 Joint WEM Governing Body and ISO Board of Governors approval	Aug 26, 2025 Configurable Parameters working group Sep 16, 2025 Comments due - Configurable Parameters Oct 21, 2025* Configurable Parameters working group Nov 20, 2025* Configurable Parameters working group Dec 18, 2025* Configurable Parameters working group Jan 29, 2026* Configurable Parameters working group Feb 26, 2026* Configurable Parameters working group Mar 26, 2026* Configurable Parameters working group Dec 23, 2024 Day-Ahead Market Enhancements - BRS posted May 01, 2026 Activation Implementation milestones

Activities

Web meeting	Presentation - Day-Ahead Market Enhancements Configurable Parameters Implementation Working Group - Aug 26, 2025 08/25/2025	Submit comments Due: Sep 16, 05:00 pm Comments
BRS review	Business Requirements Specification v1.5 Redline - Day-Ahead Market Enhancements 04/08/2025 Comments requested by April 30, 2025 CAISO Comments Response - Business Requirements Specification - Day-Ahead Market Enhancements v1.5 05/20/2025	Comments
BRS review - comments due	Business Requirements Specification v1.4 Redline - Day-Ahead Market Enhancements 12/23/2024 Comments requested by Jan 23, 2025 Business Requirements Specification v1.3 - Extended Day-Ahead Market 12/23/2024	Comments
Web meeting	ISO Responses to Aug 07, 2024 Stakeholder Comments - Day-Ahead Market Enhancements Configurable Parameters Implementation Working Group - Dec 11, 2024 12/10/2024 Presentation - Day-Ahead Market Enhancements Configurable Parameters Implementation Working Group - Dec 11, 2024 12/10/2024 Video - Day-Ahead Market Enhancements Configurable Parameters Implementation Working Group - Dec 11, 2024 12/24/2024	View comments Comments
Web meeting	Video - Day-Ahead Market Enhancements Configurable Parameters Implementation Working Group - Aug 07, 2024 08/12/2024 Presentation - Day-Ahead Market Enhancements Configurable Parameters Implementation Working Group - Aug 07, 2024 08/05/2024	View comments Comments
BRS Review	Business Requirements Specification v1.3 Redline - Day-Ahead Market Enhancements 08/05/2024 Comment period 9/1/2024 through 9/30/2024 Business Requirements Specification v1.3 - Day-Ahead Market Enhancements 08/05/2024 Comment period 9/1/2024 through 9/30/2024	View comments Comments
Web meeting	Draft Compliance Filing Language - Day-Ahead Market Enhancements and Extended Day-Ahead Market 02/05/2024	Comments
Filing	Dec 20, 2023 Order Accepting Tariff Revisions in Part - Subject to Condition, and Rejecting in Part - Extended Day Ahead Market - Day Ahead Market Enhancements (ER23-2686) 12/28/2023 Aug 22, 2023 DAME/EDAM Tariff Amendment (ER23-2686) 08/28/2023	Comments
Web meeting	Video - Day-Ahead Market Enhancements - Jul 27, 2023 08/01/2023 Revised Draft Tariff Language - Day-Ahead Market Enhancements 07/11/2023 Revised Draft Tariff Matrix - Day-Ahead Market Enhancements 07/11/2023	View comments Comments
Web meeting	Video - Day-Ahead Market Enhancements Draft Tariff Language - Jun 23, 2023 06/28/2023 Draft Tariff Language - Day-Ahead Market Enhancements - Jun 22, 2023 06/02/2023 Draft Tariff Matrix - Day-Ahead Market Enhancements - Jun 22, 2023 06/02/2023	View comments Comments
	The WEIM Governing Body market expert's opinion will be presented during the May 16, 2023, WEIM Governing Body general session meeting. WEIM Governing Body Market Expert Opinion on Day-Ahead Market Enhancements - Updated Presentation - May 2023 05/10/2023 WEIM Governing Body Market Expert Opinion on Day-Ahead Market Enhancements - Updated Memo - May 2023 05/10/2023	Comments
	Notice of Decisional Classification - Day-Ahead Market Enhancements - May 2023 05/10/2023	Comments
Web meeting	Video - Day-Ahead Market Enhancements - May 2, 2023 05/03/2023 Presentation - Day-Ahead Market Enhancements - May 2, 2023 05/01/2023 Revised Final Proposal - Day-Ahead Market Enhancements 05/01/2023 Flexible Parameter Matrix - Day-Ahead Market Enhancements 05/01/2023	Comments
	Addendum - Imbalance Reserve Demand Curve - Day-Ahead Market Enhancements 04/19/2023	Comments
Web meeting	Video - Day-Ahead Market Enhancements Workshop - Apr 17, 2023 04/19/2023 Presentation - Day-Ahead Market Enhancements - Apr 17, 2023 04/17/2023 CESA Presentation - Day-Ahead Market Enhancements - Apr 17, 2023 04/17/2023	Comments
Hybrid meeting	Video - Day-Ahead Market Enhancements - Apr 7, 2023 04/11/2023 Presentation - Day-Ahead Market Enhancements - Apr 7, 2023 04/06/2023 Draft Revised Final Proposal - Day-Ahead Market Enhancements 04/06/2023 Excel Solver Examples - Electrical Storage Resource Day-Ahead Market Enhancements Constraints 04/10/2023	View comments Comments
	Comparison Matrix - Day-Ahead Market Enhancements 03/20/2023	Comments
Web meeting	Market Surveillance Committee meeting MSC Presentations - Day-Ahead Market Enhancements - Mar 10, 2023 03/16/2023	Comments
Hybrid meeting	Day 2 of a two-day workshop Video - Day-Ahead Market Enhancements Workshop - Mar 8, 2023 03/10/2023 Presentation - Day-Ahead Market Enhancements - Mar 8, 2023 03/08/2023 WPTF Presentation - Day-Ahead Market Enhancements - Mar 8, 2023 03/08/2023	View comments Comments
Hybrid meeting	Day 1 of a two-day workshop Video - Day-Ahead Market Enhancements Workshop - Mar 7, 2023 03/09/2023 Presentation - Day-Ahead Market Enhancements - Mar 7, 2023 03/07/2023 Vistra Presentation - Day-Ahead Market Enhancements - Mar 7, 2023 03/07/2023 SCE Presentation - Day-Ahead Market Enhancements - Mar 7, 2023 03/06/2023 ISO Response to SCE Presentation - Day-Ahead Market Enhancements - Mar 7, 2023 03/07/2023	Comments
Web meeting	Video - Day-Ahead Marker Enhancements Workshop - Feb 27, 2023 03/01/2023 Presentation - Day-Ahead Market Enhancements - Feb 27, 2023 02/27/2023 WPTF Presentation - Day-Ahead Market Enhancements - Feb 27, 2023 02/27/2023 Vistra Presentation - Day-Ahead Market Enhancements - Feb 27, 2023 02/27/2023	Comments
	Final Proposal - Day-Ahead Market Enhancements 01/11/2023	Comments
Web meeting	Video - Day-Ahead Market Enhancements - Jan 4, 2023 01/06/2023 Presentation - Day-Ahead Market Enhancements - Jan 04, 2023 01/04/2023 Draft Technical Description Presentation - Day-Ahead Market Enhancements - Jan 04, 2023 01/04/2023 Draft Technical Description - Day-Ahead Market Enhancements 12/22/2022	Comments
Web meeting	Market Surveillance Committee meeting Day-Ahead Market - Presentation - Dec 12, 2022 12/12/2022	Comments
Web meeting	Video - Day-Ahead Market Enhancements - Dec 7, 2022 12/09/2022 Presentation - Day-Ahead Market Enhancements - Dec 7, 2022 12/06/2022 Draft Final Proposal - Day-Ahead Market Enhancements 12/01/2022 Draft Technical Description - Day-Ahead Market Enhancements 12/07/2022 Analysis - Methodologies to Determine Imbalance Reserve Up Eligibility Price Cap - Day-Ahead Market Enhancements 12/01/2022	View comments Comments
Web meeting	Presentation - Day-Ahead Market Enhancements - Nov 01, 2022 10/31/2022 Fourth Revised Straw Proposal - Day-Ahead Market Enhancements 10/26/2022 Video - Day-Ahead Market Enhancements - Nov 1, 2022 11/02/2022	View comments Comments
Web meeting	Market Surveillance Committee meeting Presentation - Day-Ahead Market Enhancements - Sep 26, 2022 09/27/2022	Comments
Web meeting	Presentation - Day-Ahead Market Enhancements - Sep 14, 2022 09/22/2022 Video - Day-Ahead Market Enhancements - Sep 22, 2022 09/27/2022	Comments
Web meeting	Video - Day-Ahead Market Enhancements Stakeholder Workshop - Sep 14, 2022 09/20/2022 Presentation - Day-Ahead Market Enhancements - Sep 14, 2022 09/14/2022	Comments
Web meeting	Market Surveillance Committee meeting - May 13, 2022 05/18/2022	Comments
Web meeting	Video - Day-Ahead Market Enhancements - Third Revised Straw Proposal - Apr 29, 2022 05/12/2022 Presentation - Day-Ahead Market Enhancements - Apr 29, 2022 04/27/2022 Presentation - Appendix C - Local Market Power Mitigation Examples 04/28/2022 Third Revised Straw Proposal - Day-Ahead Market Enhancements (updated Apr 27, 2022) 04/28/2022 Revisions to the proposal include language added to the WEIM Governing Body Role section and a few other minor clarifications within the proposal. The clarifications will be discussed during the Apr 29 meeting. Appendix B Third Revised Straw Proposal - Day-Ahead Market Enhancements 04/22/2022 Appendix C Third Revised Straw Proposal - Day-Ahead Market Enhancements 04/22/2022	View comments Comments
Web meeting	Video - Day-Ahead Market Enhancements Stakeholder Workshop - Mar 2, 2022 03/07/2022 Presentation - Day-Ahead Market Enhancements Stakeholder Workshop - Mar 2, 2022 03/02/2022	View comments Comments
Web meeting	Market Surveillance Committee meeting - Feb 11, 2022 02/08/2022	Comments
Web meeting	Video - Day-Ahead Market Enhancements - Jan 24, 2022 01/27/2022 Presentation - Day-Ahead Market Enhancements - Stakeholder Workshop - Jan 24, 2022 01/21/2022 Presentation - Day-Ahead Market Enhancements Analysis - Jan 24, 2022 01/24/2022 Day-Ahead Market Enhancements Analysis Report - Jan 24, 2022 01/24/2022	View comments Comments
Web meeting	Video - Day-Ahead Market Overview - Nov 30, 2021 12/03/2021 Presentation - Day-Ahead Market Overview - Nov 30, 2021 11/23/2021	Comments
Web meeting	Market Surveillance Committee meeting - Nov 19, 2021 11/18/2021	Comments
	Market Surveillance Committee meeting - Aug 27,2021 08/23/2021	Comments
Web meeting	Meeting cancelled - the presentation was covered during the July 28 meeting and, therefore this meeting is no longer needed and has been cancelled. Please see July 28 activity below to access the presentation, proposal and other related materials.	Comments
Web meeting	Video - Day-Ahead Market Enhancements - Jul 28, 2021 08/03/2021 Appendix B - Draft Technical Description - Day-Ahead Market Enhancements 08/06/2021 Presentation - Day-Ahead Market Enhancements Second Revised Straw Proposal Meeting - Jul 28-29, 2021 07/27/2021 Second Revised Straw Proposal - Day-Ahead Market Enhancements 07/21/2021 FMM and RTD Settlement Example - Day-Ahead Market Enhancements 07/23/2021 Presented at the May 21, 2021 Market Surveillance Committee meeting	View comments Comments
Web meeting	Market Surveillance Committee 07/22/2021 Includes FMM and RTD settlement example	Comments
Web meeting	Market Surveillance Committee 12/10/2020	Comments
Web meeting	Presentation - Day-Ahead Market Enhancements Initiative Update - Oct 29, 2020 10/27/2020	Comments
Web meeting	Market Surveillance Committee 07/15/2020	Comments
Web meeting	Presentation - Day-Ahead Market Enhancements - Jun 15 and 17, 2020 06/11/2020 Presentation - Day-Ahead Market Enhancements - Market Formulation 06/17/2020 Revised Straw Proposal - Day-Ahead Market Enhancements 06/09/2020 Reliability Capacity - Imbalance Reserve Requirement Calculation - Day-Ahead Market Enhancements 06/08/2020	Comments AWEA CA Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 BANC Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/18/2020 BPA Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 Calpine Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 CDWR Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 DMM Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 Joint EIM Entities Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 LSA Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 MRP Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 NCPA Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 PacifiCorp and NV Energy Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 PAO-CPUC Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 PG&E Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 PGP Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 Powerex Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 PPC Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 PSE Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 SCE Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 SDG&E Comments - Day-Ahead Market Enhancements Revised Straw Proposal 09/29/2020 Six Cities Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 SMUD Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 SVP Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 Wellhead Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/14/2020 WPTF Comments - Day-Ahead Market Enhancements Revised Straw Proposal 07/18/2020
Web meeting	Presentation - Day-Ahead Market Enhancements and Extended Day-Ahead Market Initiatives Update - Apr 16, 2020 04/13/2020	Comments
Web meeting	Market Surveillance Committee 03/12/2020	Comments
Web meeting	Presentation - Day-Ahead Market Enhancements - Mar 5, 2020 03/02/2020 Comments Template - Day-Ahead Market Enhancements Straw Proposal 03/02/2020	Comments
In-person meeting	Presentation - Day-Ahead Market Enhancements - Feb 10, 2020 02/07/2020 Reposted to correct minor typos Straw Proposal - Day-Ahead Market Enhancements 02/07/2020 Reposted to correct minor typos Variable Energy Resource Bidding and Scheduling Solver 02/03/2020 Draft Technical Description - Day-Ahead Market Enhancements (Appendix C) 02/08/2020	Comments BANC Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 BPA Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 CDWR Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 Chelan PUD Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 Clark PU Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 CPUC Staff Comments - Day-Ahead Market Enhancements - Straw Proposal 04/01/2020 DC Energy Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 DMM Comments - Day-Ahead Market Enhancements - Straw Proposal 03/30/2020 EIM Entities Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 EWEB Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 LSA Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 MRP Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 NCPA Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 PAO Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 PG&E Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 PGP Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 Powerex Comments - Day-Ahead Market Enhancements - Straw Proposal 04/01/2020 PPC Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 SCE Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 Shell Energy Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 Six Cities Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 SMUD Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 Wellhead Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020 WPTF Comments - Day-Ahead Market Enhancements - Straw Proposal 03/27/2020
In-person meeting	Presentation - Day-Ahead Market EnhancementsWorking Group - Aug 13, 2019 08/09/2019	Comments BPA Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 CDWR Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 Chelan PUC Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 CPUC PAO Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 CPUC Staff Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 DMM Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 09/09/2019 EDF Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 EWEB Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 MRP Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 NCPA Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 NRG Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 PAC Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 PG&E Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 PGP Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 Powerex Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 Powerex Supplemental Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings - Appendix B 08/28/2019 Powerex Supplemental Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings- Appendix A 08/28/2019 PPC Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 SCE Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 09/04/2019 SCL Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 SDG&E Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 09/04/2019 Six Cities Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 SMUD Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 Tacoma Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 Wellhead Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019 WPTF Comments Day-Ahead Market Enhancements - Aug 13 and Aug 19 Meetings 08/28/2019
In-person meeting	Presentation - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 06/19/2019 Draft Technical Description - Day-Ahead Market Enhancements (Integrated Forward Market - Flexible Ramping Product) 06/13/2019 Draft Technical Description - Day-Ahead Market Enhancements (Integrated Forward Market - Residual Unit Commitment) 06/03/2019 Solver Worksheet - Day-Ahead Market Enhancements (Integrated Forward Market - Flexible Ramping Product) 06/03/2019 Solver Worksheet - Day-Ahead Market Enhancements (Integrated Forward Market - Residual Unit Commitment) 06/03/2019	Comments BPA Comments - Day-Ahead Market Enhancements Workshops - Jun 20, 2019 07/15/2019 Chelan Comments - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 07/15/2019 DMM Comments - Day-Ahead Market Enhancements Workshops - Jun 20, 2019 07/24/2019 EWEB Comments - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 07/15/2019 LS Power Comments - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 07/15/2019 MRP Comments - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 07/15/2019 NVE Comments - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 07/15/2019 PG&E Comments - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 07/15/2019 PGP Comments - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 07/15/2019 Powerex Comments - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 07/15/2019 PPC Comments - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 07/15/2019 PSE Comments - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 07/15/2019 SCE Comments - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 07/15/2019 SCL Comments - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 07/15/2019 SDG&E Comments - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 07/15/2019 Six Cities Comments - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 07/15/2019 Tacoma Comments - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 07/15/2019 Wellhead Comments - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 07/15/2019 WPTF Comments - Day-Ahead Market Enhancements Workshop - Jun 20, 2019 07/15/2019

Stakeholder center

INITIATIVE: Day-ahead market enhancements

Status

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BRS review

BRS review - comments due

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INITIATIVE:
Day-ahead market enhancements