5:

Integration testing is done to test the modules/components when integrated to verify that they work as expected i.e. to test the modules which are working fine individually does not have issues when integrated.

When talking in terms of testing large application using black box testing technique, involves the combination of many modules which are tightly coupled with each other. We can apply the Integration testing technique concepts for testing these types of scenarios

example:

6:We know what testing is, acceptance means approval or agreement. The 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).

So, following my rule – the definition will be:

User Acceptance Testing (UAT), also known as beta or end-user testing, is defined as testing the software by the user or client to determine whether it can be accepted or not. This is the final testing performed once the functional, system and regression testing are completed.

As the user acceptance test is the last testing that is carried out before the software goes live, obviously this is the last chance for the customer to test the software and measure if it is fit for the purpose.

When Is It Performed?

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

when is 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 the time and when their feedback is sought out.

The team can be comprised of beta testers or the customer should select UAT members internally from every group of the organization so that each and every user role can be tested accordingly.

Need For User Acceptance Testing

Developers and functional testers are technical people who validate the software against the functional specifications. They interpret the requirements according to their knowledge and develop/test the software (here is the importance of domain knowledge).

This software is complete according to the functional specifications but there are some business requirements and processes that are known only to the end-users are either missed to communicate or misinterpreted.

This testing plays an important role in validating if all the business requirements are fulfilled or not before releasing the software for market use. The use of live data and real use cases make this testing an important part of the release cycle.

Many businesses that suffered big losses due to post-release issues know the importance of a successful User Acceptance Test. The cost of fixing the defects after release is many times greater than fixing it before.

Is UAT Really Necessary?

After performing loads of system, integration and regression testing one would wonder about the necessity of this testing. Actually speaking, this is the most important phase of the project as this is the time at which the users who are actually going to use the system would validate the system for its fit to purpose.

UAT is a test phase that largely depends on the perspective of the end-users and the domain knowledge of a department that represents the end-users.

As a matter of fact, it would really be helpful to the business teams, if they were involved in the project quite early, so that they can provide their views and contributions that would help effective usage of the system in the real world.

User Acceptance Testing Process

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

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

#1) Gather the key Acceptance Criteria

In simple terms, Acceptance criteria is a list of things that are going to get evaluated before accepting the product.

** Please note that it is just a guidance. This could be modified based on the project needs and requirements.

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