IT change and release management

This page lists schedules for IT changes and releases across AEMO’s electricity and gas market systems. All change management is governed under the IT Change Management Policy and Procedure.

IT changes

AEMO’s IT change schedule informs AEMO participants in advance about IT changes and provides a consolidated view of the changes planned. This is another step towards standardising the maintenance and outage windows for AEMO’s market-facing systems, helping to better manage any impact as well as overall planning of changes and releases.

Outage and maintenance windows

The IT outage and maintenance windows (change windows) for major system changes outline specific timeframes when IT changes will occur.

Wholesale Electricity Market (WEM)


The table below details the release and build which is currently running in each environment. The snapshot date indicates the date at which the last snapshot of Production market data was taken for the environment, as applicable.

Environment Version Snapshot date Link
Production WEMS 4.1 (Build 4.1-1573-12)
RCM version 2.2 (Build 2.2-3060-6)
WEM PaSS 3.3 (Build 3.3-836-1)
Market Trial WEMS 4.1 (Build 4.1-1573-12)
RCM version 2.2 (Build 2.2-3060-6)
WEM PaSS 3.3 (Build 3.3-836-1)         

Market Trial environments can simulate the operation of the WEM, but actual market outcomes may vary in these environments due to testing activities of Market Participants and AEMO, differences in software versions, and the time since the last snapshot.

Gas markets and systems

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