UAT vs. SIT in Software testing 2023

System Integration Testing (SIT) and User Acceptance Testing (UAT) are the two important types of software testing. Both these testing types are strategically used in the different phases of the software development process. Module connections and interfaces are tested by SIT with various system components such as hardware, software and system interfaces. When it comes to UAT, the testing process is performed by end-users and ultimately, their feedback and perspective about the product is taken into consideration. In this article, you will get to know the differences between UAT and SIT.   

What is System Integration Testing (SIT)? 

It is a testing method wherein the overall system is tested that is made up of numerous interconnected components. It may be performed on a system with different software components, distinct hardware components or a combination of both. The interface between different system modules, such as hardware, software etc., is properly tested. When the integration of individual system components is done into a single working system, then SIT is performed. 

The interactions between the different software aspects of the system are validated. The entire system is tested to make sure that the system meets the specified requirements and that all the system components are functioning appropriately. The low-level and high-level software requirements that are mentioned in the software design and software requirements document are properly validated. 

The working scenario of SIT: 

1. The integration of individual units is done first in separate builds 

2. Testing of the entire system takes place 

3. Proper software should be used to write test cases based on software requirements 

4. Interface errors, data flow errors and UI errors are errors that are being found in this testing. 

What is User Acceptance Testing (UAT)? 

This testing method is performed in the final stages of the software development process. The objective of this testing method is to let end-users test the software product or application in a real-time environment and then provide their valuable feedback. This feedback will help the testing team to further modify or change certain aspects of the software product or application depending on the user and business needs. 

It is a formal testing method that is conducted to ascertain whether a software product or system is able to meet the acceptance criteria. It ensures that the end-user's needs are met amicably. The end-user's viewpoint is given due importance because ultimately, the software product or application is built for end-users/customers. This testing method also ensures that the performance of the product or system is as documented in the system requirement specifications.  

The working scenario of UAT: 

1. Creating a UAT plan based on specific requirements 

2. Requirements are used to build the scenarios 

3. Prepare the test data and the test cases  

4. Run and check the test cases to identify any bugs 

5. If the test cases have passed the project and there are no bugs, then the project can be signed off and sent for production 

6. The bugs and defects that have been identified should be fixed immediately so that the product can be released.