Implementation Plan

The WEM Reform program consists of 26 work packages grouped into 11 implementation projects across six workstreams. Each of the implementation projects will involve:

  • Development of WEM Procedures relating to the required Market changes
  • System enhancements and integration, including associated requirements analysis, design, build and testing activities.
  • User acceptance testing (UAT) and Business and Market Trials to ensure that changes are fit for purpose;
  • Business process change relating to required market and system changes; and
  • Stakeholder engagement and training to ensure our stakeholders understand the changes and are trained and ready to operate in the new market.

The implementation plan is based on the 1 October 2023 go live for major reforms including Security Constrained Economic Dispatch (SCED) and Essential System Services (ESS). This start date aligns with the annual Reserve Capacity year start to avoid the additional complexity of transitional arrangements. 

Around 85% of WEM Reform regulatory scope will be delivered by the go-live date with AEMO’s IT systems released in stages to de-risk delivery, enable individual application testing, and manage resource demands.

All SCED minimum viable product will be delivered on 1 October 2023 with some post go live system enhancement activity for the SCED Digital Training Simulator (DTS) Integration, Short Term PASA, Medium Term PASA phase 2 and RCM phase 3. These system enhancements will have minimal impact on market participants.

We are confident that the proposed implementation plan will de-risk delivery and help build a market and power system that will support a better energy future for Western Australians.

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