What is User Acceptance Testing (UAT) and How to Perform It Effectively?

User Acceptance testing is the topic of the day. We will discuss all about UAT – its definition, types, steps, detailed process etc. in this tutorial.

Starting with….

What is User Acceptance Testing (UAT)?

My rule number one when trying to understand a new concept is that: the name is always going to be relevant and mostly a literal meaning (in the technical context). Finding out what that is, will give me an initial understanding of it and gets me started.

Let us put this concept to test. UAT stands for User Acceptance Testing. We know what testing is, acceptance means approval or agreement. User in the context of a software product is either the consumer of the software or the person who requested it to be built for him/her (client).

User Acceptance Testing (UAT)

So, following my rule -UAT means testing a software by the user/client to determine whether it can be accepted or not – the definition. Give this method a try with other technical words too. Trust me, it works every single time. :)

Also read => 7 Major Challenges of Successful UAT and How to Overcome These

When is it performed?

This is typically the last step before the product goes live or before the delivery of the product is accepted. UAT is after the product itself is thoroughly tested (i.e after system testing).

when UAT performed

Who performs UAT?

Users or client – This could be either someone who is buying a product (in the case of commercial software) or someone who has had a software custom built through a software service provider or the end user if the software is made available to them ahead of time and when their feedback is sought.

User Acceptance Testing Process: How is UAT performed?

The easiest way to understand this process is to think of UAT as an autonomous testing project – which means, it will have the plan, design and the execute phases.

The following are the pre-requisites before the plan phase begins:

#1. Gather the key acceptance criteria

Acceptance criteria- to simply put, this is a list of things that are going to get evaluated before accepting the product. These could be of 2 types:

A) Application functionality or business related

Ideally all key business functionality should get validated but due to various reasons, including time, it is not practical to do it all. Therefore, a meeting or two with the client or the users who are going to be involved in UAT can give us an idea on how much testing is going to be involved and what aspects are going to be tested.

B) Contractual – we are not going to go into this and the involvement of the QA team in all this is almost nothing. The initial contract that gets drawn up even before the SDLC begins is reviewed and an agreement is reached upon whether all the aspects of the contract have been delivered or not.

We are going to focus only on application functionality.

#2. Define the scope of QA involvement. QA team’s role is one of the following:

A) No involvement – This is very rare.

B) Assist in UAT – most common. In this case, our involvement could be training the UAT users in how to use the application and be on standby during the UAT to make sure we can help the users in case of any difficulty. Or in some cases, in addition to being on standby and assisting, we might share their responsibility and record the results or log bugs etc. while the users perform the actual testing.

C) Perform UAT and present results – If this is the case, the users will point the areas of the AUT that they want to evaluate and the evaluation itself is performed by the QA team. Once done, the results are presented to the clients/users and they will make a decision on whether the results that they have in hand are sufficient and in accordance with their expectations in order to accept the AUT. The decision is never that of the QA team.

Depending on the case on hand, we decide which approach is best.

UAT Test planning

The process is almost the same as with the regular test plan for the system phase. The most common approach followed in most of the projects is to plan for both system and UAT testing phases together. For more information on UAT test plan and a sample, check out the attached test plan document’s UAT sections.


User Acceptance Test Plan

(This is the same that you would find on our site for the QA training series as well).

Click on below image and scroll down to find the test plan document sample in various formats. In that template check the UAT section.

UAT Test Plan

The dates, environment, actors(who), communication protocols, roles and responsibilities, templates, results and their analysis process, entry-exit criteria – all of this and anything else relevant will be found in the UAT test plan. Whether the QA team is participating, partially participating or not participating at all in the UAT, it is our job to plan this phase and make sure everything is taken into consideration.

UAT design

The gathered acceptance criteria from the users are used in this step. Samples could look like the following:

(These are excerpts from CSTE CBOK. This is the one of the best of the few references available about UAT.)

User Acceptance Testing Template:

UAT Template

Based on the criteria, we (QA team) give them the users a list of UAT test cases. UAT test cases are not different from out regular system test cases. They are just a sub set since we test all of the application as opposed to just the key functional areas.

In addition to these, the data, templates to record test results, administrative procedures, defect logging mechanism has to be in place before we move to the next phase.

UAT Test execution

Usually, when possible, UAT happens in a conference or war room sort of a set up where the users, PM, QA team representatives all sit together for a day or two and work our work through all the acceptance test cases.

Or in case of QA team performing the tests, we run the test cases on the AUT.

Once all the tests are run and the results are in hand, the Acceptance Decision is made. This is also called the Go/No-Go decision more colloquially. If the users are satisfied it’s a Go, or it’s a No-go.

The reaching of the acceptance decision is typically the end of UAT phase.

Important UAT points:

#1. UAT is not about the pages, fields or buttons. The underlying assumption before even the UAT begins is that, all that basic stuff is tested and is working fine. God forbid, the users find a bug as basic as that – it is very bad news for the QA team. :(

#2. UAT is about the entity that is the primary element in the business.

Let me give you an example: If the AUT is a ticketing system, the UAT is not going to be about, searching, the menu that opens a page etc. It is about the tickets and their reservation, the states that it can take, its journey through the system. Another example, if the site is a car dealership site, the focus is about the “car and its sales” not the site really. So the core business is what is verified and validated and who better to do it than the business owners. That’s why UAT makes the most sense when the customer is involved to a major extent.

#3. UAT is also a form of testing at its core which means there is a good chance of identifying some bugs at this phase too. It sometimes happens. Aside from the fact that it is a major escalation on the QA team, the UAT bugs usually means a meeting to sit and discuss how to handle them because following UAT there is usually no time to fix and retest.

The decision would be either to:

  • Push the go-live date, fix the issue first and then move on
  • Leave the bug as is
  • Consider it as a part of change request for future releases

#4. UAT is classified as Alpha and Beta testing, but that classification is not so important in the context of typical software development projects in a service based industry.

  • Alpha testing is when UAT is carried out in the software builder’s environment and is more significant in the context of commercial off the shelf software.
  • Beta testing is when the UAT is carried out in the production environment or the client’s environment. This is more common for customer facing applications. The users here are the actual customers like you and I in this context.

#5. Most of the times in a regular software development project, UAT is carried out in the QA environment if there is no staging or UAT environment.

About the Author: This article is written by STH team member Swati S. She is having 9+ years of experience in software testing.

What was your UAT experience? Were you on standby or did you test for your users? Did the users find any issues? If yes, how did you deal with them?

Share your experiences with us and let us know your comments and questions below.


#1 baba saimon

Recently I was involved in a UAT testing where they want “WINK” files to be uploaded with the required test cases. What do they mean by “wink” files ? Can anybody give me some idea.



#2 Mehulkumar

how to handle if there is defect from client in UAT?

#3 vir

Very good document… really knowledgeable and cleared many things about UAT.

#4 vir

Baba Saimon,

here is a small info about Wink files.. hope this helps

Winks are Flash-based animated files that appear in Windows Live Messenger. When a user sends a Wink to a friend, the animation file is transferred over the Internet and is displayed on the recipient’s computer screen. Microsoft provides some Winks for free with Windows Live Messenger and also links to third party websites where other Winks can be purchased.

#5 AH Khan

Very Nice Explanation on UAT Process but i would recommend the Quality Gateways as the Prerequisite for UAT.

#6 M Pinjari

It’s very informative and clear article about UAT
Thanks Swati S.

#7 Swati Seela

@All: Thanks for stopping by and your readership!

#8 Swati Seela

@Mehulkumar: Defects are part of any testing, and so is the case with UAT.

Please check #3 for your answer.

#9 Baba Saimmon

Hello Vir,
Thanks for your explanation. I understand what you said. But I don’t think that is what is required here. They said in the test document that
“Wink files (.htm, .swf, .js) in a compressed zip file with the following name format:
What is the meaning or explanation of that ?



#10 Jaydeep

It was really a nice article on UAT, but could you please provide difference between UAT and SIT.

#11 paramus

nice presentation.

this has cleared a lot of issues regarding system and uat

#12 Hammed

Thanks for the great explanation of the user acceptance testing.
What is the difference between User Acceptance Testing(UAT) and User Verification Testing(UVT).

#13 Arundar

You missed a very important point!! You did not describe what a test case should look like. Too many times, I have seen test cases that provide the instructions for how to carry out the tasks. No! Test cases must be real-life tasks that you expect the user to perform and the tester indicates whether or not they could figure out how to perform the task.

#14 Sumit

@Baba Saimmon : Wink is a screenshot capturing application. Easy to use – one touch capturing is provided, extension for wink file is *.wnk. I’ve used it.

#15 Anonymous

@baba Wink can be created in different file formats with different extentions. Once that file is created it can be compressed in ZIP file. It means 10MB size of file can be compressed to smaller size for example 5 to 7 MB. And user other hand can UNZIP or say Decompress file in original size of 10 MB.

#16 lalita

swati ‘all, client or user are non technical person then how canthey perform the UAT testing. Please let me know

#17 Rogerio da Silva

Awesome article. I’m involved specifically on UAT tests on a new contract role and this has refreshed my memory and helped me focus on what is the key elements of UAT only. Thank you. ;-)


We have performed UAT for Core Banking System of Bank. Now they need UAT completion certificate format. If it is available as standard format, please send me on my email address.

#19 Peter

“Swati S” for sure is nothing else but another Indian piece of shit

#20 Tink

#16 lalita – Most UAT business users work primarily on the GUI or going to a shop and using a card for example. However depending on what your testing will depend on the system and the users needed for that type of product.

I also agree that QA should be signed off prior to accepting in UAT…

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