Compliance and audit
WEM Audit
AEMO's compliance with the Market Rules is audited once a year by the Market Auditor. The audit covers:
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the compliance of AEMO's internal procedures and business processes with the Market Rules
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AEMO's compliance with the Market Rules and Market Procedures
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AEMO's market software systems and processes for software management.
Software Systems Certification
Certification of Initial Market Software Systems
Before the start of the Wholesale Electricity Market in Western Australia the IMO and System Management jointly appointed PA Consulting to certify software systems used in the operation and settlement of the market.
The purpose of this certification was to ensure that the software systems were compliant with the version of the Market Rules that applied at the time.
The attached documents consist of:
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The final Audit and Certification report
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Letters to both the IMO and System Management providing certification of the software systems.
These documents are available from the following links:
Certification of Market Software Systems for Balancing and Load Following Markets
In accordance with clause 2.36 of the Market Rules, the IMO appointed PA Consulting to certify software systems used in the operation and settlement of the Balancing and Load Following Ancillary Services Markets.
The purpose of this certification was to ensure that the IMO's software systems were compliant with the version of the Market Rules that applied at the commencement of the new markets on 1 July 2012.
The attached document consists of the letter to the IMO providing certification of the software systems.
The Market Auditor's annual reports on compliance of internal procedures and business processes as inherited by AEMO, are available below.
Market Audits
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18/11/2024
AEMO Independent Assurance Report - WEM 2023-24
426.58 KB -
18/11/2024
AEMO's Response to WEM and GSI Market Audit Reports 2023-24
372.27 KB -
31/10/2023
AEMO Independent Assurance Report - WEM 2022-23
427.89 KB -
31/10/2023
AEMO's Response to WEM and GSI Market Audit Reports 2022-23
389.26 KB -
21/02/2023
AEMO Independent Assurance Report - WEM 2021-22
480.11 KB -
10/01/2023
AEMO's response to audit reports 2021-22
387.29 KB -
13/12/2021
RBP AEMO WEM Audit Report v2.6
1.42 MB -
13/12/2021
AEMO's response to audit reports 2020-21
231.54 KB -
13/10/2020
RBP AEMO WEM Audit Report v1.0
1.61 MB -
15/10/2020
AEMO's response to audit reports 2019-20
530.86 KB -
24/10/2019
RBP AEMO WEM Audit Report v2.4
1.17 MB -
24/10/2019
AEMO's response to audit reports
203.92 KB -
22/11/2018
AEMO Independent Assurance Report - WEM – 2018
1.17 MB -
22/11/2018
AEMOs response to final audit report 2018
102.09 KB -
25/01/2017
AEMO Independent Assurance Report - WEM - 2017
AEMO Independent Assurance Report - WEM - 2017
1.3 MB -
25/01/2017
AEMOs response to final audit reports
197.5 KB -
25/07/2016
2007 IMO Audit 1
334.15 KB -
25/07/2016
2007 IMO Audit 2-1
151.94 KB -
25/07/2016
2007 IMO Audit 2-2
30.94 KB -
25/07/2016
2007 IMO Audit 3
264.02 KB