CS Energy has published the interim results for its performance against the Electricity Maintenance Guarantee in FY2025.
The Guarantee is the Queensland Government's new investment, performance and accountability framework for asset maintenance on existing publicly-owned power plants.
CS Energy is committed to delivering on the Guarantee in order to fulfill the Government’s objective of delivering affordable, reliable and sustainable energy to Queenslanders.
To support this, the CS Energy Board set new key performance indicators (KPIs) in FY2025 for maintenance investment, personal safety, process safety and plant performance.
interim results
CS Energy's performance against its nine KPIs for FY2025 is summarised in the tables below. These results are interim and subject to further assurance processes. Final results will be published in CS Energy's Annual Report in September 2025.
We met our KPIs for critical control verifications, significant injury or fatality, bowties and summer availability.
We did not meet the following five KPIs:
- Significant process safety event - the Callide Unit C3 major operational safety event on 4 April 2025 meets the definition of a significant process event.
- Safety critical equipment - the result of 75 per cent reflects that this KPI was achieved in three out of four quarters for the year.
- Statutory maintenance compliance - we reported three items of statutory maintenance for the March 2025 quarter that were non-compliant. There were no overdue statutory maintenance items on 4 April 2025, and overdue statutory maintenance was not a contributor to the Unit C3 incident on that date.
- Capital works delivery - the result of 75 per cent reflects that this KPI was achieved in three out of four quarters for the year.
- Equivalent forced outage factor - our actual result was 0.1 per cent outside of the target, largely due to the extended outage of Callide Unit C3 following the incident on 4 April.
Personal safety
| KPI |
FY2025 target |
FY2025 Actual |
| Critical control verifications (% of scheduled) |
100% |
100% |
| Significant injury or fatality (number) |
0 |
0 |
KPI definitions:
- Critical control verifications: Completion of on-the-job verifications to confirm that key personal safety critical controls are in place to ensure activities can be performed safely. Critical Control Verifications (CCVs) are completed when any identified actions from the CCV have been addressed and closed out. Progress is reported quarterly, with target completion of 1,500 CCVs required by the end of the financial year.
- Significant injury or fatality: An incident classed as an actual Category 4 Health and Safety incident under CS Energy’s Incident Category Matrix, which is defined as a fatality or multiple fatalities or a serious injury or illness, defined by Workplace Health and Safety Queensland, where the reasonable maximum consequence is a fatality. Performance reported each quarter, with target compliance required each quarter.
Process safety
| KPI |
FY2025 target |
FY2025 actual |
| Bowties (%) |
100% |
100% |
| Significant process safety event (number) |
0 |
1 |
| Safety critical equipment (%) |
100% |
75% |
KPI definitions:
- Bowties: This metric measures the number of process safety bowties developed. Bowties are a risk assessment method that visually displays hazards and barriers in a single diagram, helping to identify proactive and reactive risk management and better understand risks and controls. Progress is reported quarterly, with completion of 32 bowties required by the end of the financial year.
- Significant Process Safety Event: A process safety event resulting in a fatality or multiple fatalities; irreversible environmental harm; or an unplanned station outage of greater than eight weeks.
- Safety critical equipment: This metric measures the development and implementation of a Safety Critical Equipment (SCE) Management Framework to ensure SCE is clearly designated and managed. This includes the development of SCE performance standards to ensure any change or work on SCE is properly risk assessed and documented. Progress is reported quarterly, with completion required by the end of the financial year.
Maintenance
| KPI |
FY2025 target |
FY2025 actual |
| Statutory maintenance compliance (%) |
100% |
99% |
| Capital works delivery (%) |
100% |
75% |
KPI definitions:
- Statutory maintenance compliance: Compliance with statutory work obligations, by either completing (technical completion) statutory work by the required deadline, undertaking a risk assessment and confirming a unit can safely continue to operate while the statutory work is completed (where the date has been set by CS Energy management rather than legislation), or removing the unit or equipment from service. Compliance with the target is required each quarter.
- Capital works delivery: Completion of key work programs, as identified in CS Energy’s Strategic Asset Management Plan. Progress is reported quarterly, with target completion required by the end of the financial year.
Plant performance
| KPI |
FY2025 target |
FY2025 actual |
| Equivalent forced outage factor (%) |
≤10% |
10.1% |
| Summer availability (%) |
≥90% |
97.5% |
KPI definitions:
- Equivalent forced outage factor: The percentage of a given period in which a generating unit is not available either fully or partially due to a forced outage, where a forced outage is an outage that could not have been reasonably delayed by 48 hours from identification of the problem. Performance is reported each quarter, with compliance required by the end of the financial year. It includes partial derates.
- Summer availability: The combined availability factor across all five of CS Energy’s thermal units, for the period 1 January to 31 March (Q3). Availability factor is expressed as a percentage, and is measured by the number of days that a unit is online and generating electricity in Q3, compared to total days in the quarter.
Upgrading our reporting process
In addition to the audit of our FY2025 results, we are reviewing and upgrading our reporting systems and processes to support the implementation of the Electricity Maintenance Guarantee. An independent review, including an audit of all governance and assurance processes, has begun to ensure the integrity of performance measurement and reporting across all Electricity Maintenance Guarantee measures.
This review of our reporting systems and processes will ensure they are fit for purpose to support the Guarantee and is another step in making CS Energy a better organisation, able to deliver for the people of Queensland.
For further information, read our statement on upgrading reporting processes to support the Electricity Maintenance Guarantee.