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Suppliers and tenderers FAQs


Western Power maintains a registry of suppliers wishing to provide goods and/or services.

Suppliers of goods and/or services can register their interest in becoming a supplier to Western Power by completing the supplier registration form.

Completing a supplier registration form does not guarantee you the opportunity to formally quote for work. The award of any business by Western Power will be governed by, and conducted in accordance with, Western Power approved policies, standards and guidelines.

Western Power may conduct procurement processes to:

  • establish panel arrangements and one off contracts;
  • deliver project and programed services and materials that may be required on an as needed basis across the network;
  • secure optimal cost solutions for the West Australian community; and
  • ensure delivery security, performance and delivery outcomes.

Panels consist of pre-qualified suppliers selected through competitive procurement events to supply goods and/or services under agreed terms and conditions.

You cannot save your progress in the registration form so it is worthwhile having all relevant information on hand before you start. You'll be asked to provide information on:

  • your business, including information on the kind of works you perform and recent projects/clients
  • previous work performed for Western Power, including a contract number or Purchase Order number
  • your approaches to corporate and social responsibilities, including inclusivity for Aboriginal and Torres Strait Islander people, gender pay equity and use of local industry suppliers
  • your workplace safety management systems and performance
  • your organisation’s financial information, such as profitability, liquidity and level/type of insurance coverage.

You can download a copy of the registration form questions to ensure you've got all the correct information before beginning your registration.

Information to assist you with completing the form can be obtained by emailing Procurement Operations.

Information received as part of the registration process will be treated as confidential but may be disclosed to any part of Western Power as part of the supplier registration and review process.

You'll receive an email acknowledging your registration form submission.

Completed supplier registration forms are reviewed to determine whether prospective suppliers are capable of meeting the Western Power requirements for supplier pre-qualification to procurement panels.

We may pre-qualify suppliers for established panels to deliver projects, services and materials that may be required on an as-needed basis across the Western Power network.

You'll only be contacted by us if your registration is complete, accurate and your organisation is considered suitable for inclusion in a Western Power procurement event.

Being a pre-qualified supplier does not represent a guarantee of any work or being given the opportunity to formally quote for tender.

Western Power may review key terms included in responses to the supplier registration form to identify prospective suppliers that meet key criteria. To increase your likelihood of being considered your registration should be complete, accurate and include concise key terms about the services you perform.

Pre-qualified suppliers are selected following evaluation of key criteria including relevant experience and track record, capability and capacity, subcontractor management, quality management, safety management and affordability.

To ensure that we review the most up-to -date information, all existing and prospective suppliers should submit a new registration each year or earlier if there are changes to information previously submitted.

We must ensure that its procurement of goods and services achieves the best value for money outcome, and may not consider cost alone. In achieving best value for money from procurement events, Western Power considers cost and non-cost factors, where relevant.  The value for money assessment may vary in complexity depending on the nature of the procurement activity.

Value for money may represent the optimum combination of safety, whole of life costs, quality, risk, sustainability, supplier capacity and capability, and fitness for purpose to meet our requirements. The assessment of cost may consider any ongoing costs that may accrue beyond the initial price, including the associated costs of holding, using, maintaining and disposing of the goods or services.

Western Power may establish a range of panels to deliver its program of works and material requirements. Some panels are accessed for low cost and low complexity projects with short timelines; others are high cost/complexity and require extensive planning.

Use of procurement panels ensures that the ordering process is more streamlined and does not require suppliers to resubmit their standard safety, environment and quality information, or departures from the commercial documentation.

Safety is our highest priority. Each prospective supplier is assessed to ensure they have the appropriate safety standards, safety performance history and experience to complete the works.

Having suppliers pre-qualified also allows us to go to market quickly where works are required in an emergency, which is important to keep the lights on.

Pre-qualified suppliers selected through competitive procurement events may be located in, or able to service, any geographic location within the Western Power network.

To be considered for inclusion in future procurement processes, suppliers with a geographic presence in regional Western Australia are encouraged to register their interest to become a Western Power supplier by submitting a completed supplier registration form.

Western Power will consider the value for money proposition and assessment for all procurement activities and any other factors relating to our strategic and commercial objectives.

Subject to formal our written approval, a supplier may subcontract part or all of the services. A supplier may consider subcontracting all or part of the services for objectives of geographic reach, resource flexibility or access to specialist skillsets and/or qualifications.

Only under certain guidelines and not during times of Technical Specification development or during the period of an open tender.

Western Power’s purchase orders contain general terms and conditions. If the purchase order is issued under an existing contract between Western Power and the supplier, then the terms of that existing contract will apply. In these circumstances, the purchase order will include a reference to the contract number of that existing contract. 

Where there is no existing contract between Western Power and the supplier, Western Power’s purchase order terms and conditions will apply.


Ariba is Western Power’s online e-procurement system. Ariba enables Western Power to manage the tendering process electronically as well as conduct online auctions for some procurement activities. Additionally, Western Power has now initiated its Procure to Pay (P2P) module through Ariba allowing for electronic ordering and invoicing through Ariba.
If you are invited to respond to a tender you will be requested to create a profile in Ariba and respond via the Ariba system.

Suppliers can select the 'Forgot your username or password' link on the login page. This will redirect you to answer a question to verify your authenticity. Once you have answered these questions you will be emailed your username or password.

All you need to know about submitting tenders can be found in the Ariba e-Procurement System instructions. To view the presentation in slideshow mode press the F5 key on your keyboard.

Mandatory questions are marked with an ‘*’, which requires a compulsory answer. If the question is not applicable just put ‘Not Applicable’ as your response.

When opening an attachment in Ariba either choose "Download This Attachment" only or nominate a location to download all attachments that is easily accessible.

Ariba Supplier Network – Procure to Pay

Western Power already uses Ariba’s eProcurement solution for our end-to-end sourcing process which allows suppliers to respond to RFP/RFT’s and submit proposals. Western Power is now using the Ariba Procure to Pay module. This involves the ordering (Purchase Orders/Contract Service Orders) and invoicing process to be electronic through the Ariba interface.

Suppliers will be given the option to sign up to the Ariba Supplier Network. This will enable our suppliers to transact electronically, instantly and in an efficient manner with Western Power; as an integrated partner within the procurement workflow.
Suppliers will also be able to define their own level of account configuration and be able to develop catalogues for Western Power to purchase from. Some suppliers may even choose to integrate their financial systems with the network for maximum benefit.

Suppliers will be able to share a range of benefits with Western Power, including virtual and instantaneous collaboration, which will be more streamlined, automated and overall efficient. Ariba will also enable greater levels of accuracy and visibility for both Western Power and suppliers at a transactional level. Suppliers will also have access to Ariba Discovery which enables suppliers to respond to new business opportunities and leads internationally.

No. Transacting via the Ariba Supplier Network is Western Powers preferred method of transacting going forward however; signing up to the Ariba supplier network is optional.
We believe there are substantial benefits for suppliers who decide to do so. Support will be given to all suppliers to help them decide if joining the network is right for them.

If you would like to Register now please contact the Procurement Hotline on (08) 9326 4950. Ariba will be issuing introductory letters to all active suppliers on Western Power’s behalf in a waved approach. The Ariba team will follow up with each supplier and provide guidance on the registration and account set up process.

A fee will be applied for some suppliers. This fee is set by and paid to Ariba and is not revenue generating for Western Power. The Ariba supplier enablement team can provide advice on fees and whether any cost may be incurred.

The Ariba support team can be contacted via They will be able to provide technical advice in the lead up to transitioning to Ariba P2P. The remit of this team will be to support suppliers with the registration process and help them configure their accounts, set up catalogues and integrate their financial systems if this is desirable. For ongoing technical support and help relating to the day to day us of the Network please see or alternatively call the Ariba Support group on 1800 993 346.

If you would like to contact Western Power directly with any questions about the Ariba supplier network please use the feedback form and your enquiry will be directed to the appropriate Western Power representative.


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