Implementation

The WEM Reform Program was delivered through more than 20 projects over 3 years, impacting 37 systems and >200 market or operating procedures.

Each of the projects involved:

  • 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 were fit for purpose;
  • Business process change relating to required market and system changes; and
  • Stakeholder engagement and training to ensure our stakeholders understood the changes and were trained and ready to operate in the new market.

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

All SCED minimum viable products were delivered on 1 October 2023 with remaining work delivered as early as practical after the new WEM commencement.

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