Sludge audits improve services across NSW Government
The NSW Government Sludge Audit Method helps NSW teams remove barriers and improve services by making them easier and more inclusive.
Teams who use sludge audits can identify, quantify and remove the frictions that get in the way of good experiences, fairer services and trust in government.
Start a sludge audit
Use the NSW Government Sludge Audit Method Guide to plan and prepare for a sludge audit.
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The NSW Government Sludge Audit Method (PDF)
Learn how to do sludge audits to improve your government services,
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Sludge Finder
NSW public servants can use this easy and intuitive online tool to do sludge audits and collect relevant data.
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Sludge Finder Lite
Use this simplified Excel spreadsheet to conduct audits if you are outside NSW. Sludge Finder Lite has some features from our online tool.
If you are not using Sludge Finder, use the sludge scales to assess and quantify the effort it takes people to access government services.
How to get support with a sludge audit
The NSW Behavioural Insights Unit (BIU) supports teams across NSW Government to identify and remove sludge from their government services. Based on your needs, this support could include:
- providing advice and resources
- introducing your team to the sludge audit method
- providing tailored support as your team completes sludge audits
- conducting rapid or deep sludge audits with you
- supporting implementation of changes, designing and testing behavioural interventions.
Email the BIU for support

What is sludge?
Sludge describes the ‘excessive or unjustified frictions’ that make it harder for people to achieve their goals. It impacts satisfaction, trust and access to services. Sludge also prevents us from fulfilling the NSW Customer Commitments.
By removing sludge, you can make your government services easier to access and use. You can help people achieve their goals and make your services more fair and inclusive.
What does sludge in government look like?
Sludge in government can take many forms. Here are some examples:
Information that is hard to find or understand
- Conflicting or outdated information
- Complex language, jargon and slang
- Websites that are hard to navigate
Lengthy forms and processes
- Processes with unnecessary steps
- Forms that ask for unnecessary information
- Excessive wait times
Processes that lead to feelings of anxiety
- Unexpected and unnecessary requests for sensitive information
- Unnecessary or confusing compliance requirements
- Rejections provided without empathy nor explanation
Design that is not inclusive
- Websites that are incompatible with screen readers
- Information that is only available in English
- Steps that can only be completed in person, or only online
What is a sludge audit?
Sludge audits are a way to identify, quantify and remove sludge (unnecessary frictions) from government services.
Using the NSW Government sludge audit method, you can:
- understand where sludge is making your government service difficult to access
- quantify the impact of sludge on the community
- know where and how you can improve your service using behavioural science
- measure the impact of your service improvements.
What if I am outside NSW Government?
Government jurisdictions outside NSW are using behavioural insights and sludge audits to make their services better. We continue to learn from how these jurisdictions are reducing sludge.
For example, we partnered with the Organisation for Economic Co-operation and Development (OECD) to invite government jurisdictions outside NSW to participate in an ‘international sludge academy’ in 2023. During the academy, 16 jurisdictions from 14 countries trialled and tested the NSW Government sludge audit method. You can read more about the lessons we learnt from the academy here.
Help us shape the future of the sludge audit method
We welcome learning from other jurisdictions about how we can improve our method and resources. Please reach out to us if you:
- have feedback on the NSW Government sludge audit method, guides or sludge scales
- want to understand how we assess effort and experience using the evidence we have accumulated in the sludge scales
- are an academic who would like to conduct real world research around improving government services
- have done a sludge audit and would like to tell us about your experience.
How can I help improve the sludge audit method and tools?
We welcome your feedback! If you have done a sludge audit or have suggestions to improve our method, guides, or sludge scales, we would love to hear from you. Your input helps us update our resources based on new evidence and practical experience.
Email the BIU to share your feedback
Are other resources available to improve the customer experience?
Check out the below resources for tips and advice on improving how customers find and interact with your content.
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