UAT vs SIT

In Software Testing there are different levels are available. UAT and SIT are the two different levels of testing in the testing of QA. UAT stands for User Acceptance Testing and SIT stands for System Integration Testing. Here we compare UAT  vs SIT against one another.

USER ACCEPTANCE TESTING (UAT)

What is (UAT)?

• UAT is the last phase of the software testing process. During User Acceptance Testing, actual software tester users test the software to make sure it can handle required tasks in real-world scenarios, according to specifications.
• There is a two major type of UAT testing 1) Alpha Testing and 2) Beta Testing
• Alpha Testing: Alpha Testing is performed within the organization. Performed by the developer or testers.
• Beta Testing: Beta Testing is performed in a real environment outside of the organization with real users.

When is it performed?

• UAT is the last step before the product goes on to the market or released to a customer. User Acceptance Testing is performed after completing the testing process in the organization. We can say it is performed after System Testing.

Who performs UAT?

• User or Client – This could be either someone who is buying a product or someone who had a software custom built through a software service provider or end user if the software is made available to them ahead of time and when their feedback is sought.
• This user test through all over application and given their feedback to the developer. Customer or client should select UAT members from every group of the organization so that each and every user role can be tested.

The need for User Acceptance Testing.

• Before a product is going on to the live market system need to test through on a live environment. Developers and testers are technical people so each and every time not possible to cover all input which can be given by the real customers.
• The system is completed based on business requirement specification and system requirement specification. Maybe it would be different from client requirement so UAT testing will give help to customer to evaluate their product.
• Many projects will suffer big losses due to avoidance of acceptance testing. The cost of fixing defects after release is many times greater than fixing it before.

User Acceptance Testing Process

• Planning
• Designing test cases
• Selection of testing team
• Executing test cases
• Bug fixing
• Sign-Off

SYSTEM INTEGRATION TESTING (SIT)

What is (SIT)?

• System Integration Testing is a process to integrate hardware and software environment to verify the behavior of a complete system. System Integration Testing is performed to verify the interactions between the modules of a software system.
• There are two types of SIT. 1) Top-down Integration Approach 2)Bottom-up Integration Approach
• Top-down Integration Approach: In Top-down approach, modules are integrated by moving downwards in the hierarchy, where the main module is at the top.
• Bottom-up Integration Approach: In the Bottom-up approach, modules are combined and started to test at a very low level. If top modules are not ready for testing at that time bottom modules are ready for the testing.

When is it performed?

• SIT testing is generally performed in an early stage. We can say that it will be performed before the Alpha and Beta Testing release. It is performed in early stage so developer and tester get bugs and issues in the early stage of STLC. This testing is performed with either functional or nonfunctional testing.

Who performs SIT?

• SIT is generally performed by Developers and Testers in company organization. That issued with data flow, control flow.

The need for System Integration Testing

• SIT is the overall approach of testing. It covers all different types of testing. In SIT we can cover near about 50 types of testing are there. We can perform it as per time requirement, as per resource requirement, as per cost requirement and performed based on Software Tester’s Education.

System Integration Testing Process

• It helps to detect Defect early
• Earlier feedback on acceptability of the individual module will be available
• Scheduling of Defect fixes is flexible
• Correct data flow
• Correct control flow
• Correct timing
• Correct memory usage
• Correct with software requirement