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What is the difference between UAT (User Acceptance Testing) and System testing?

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posted Mar 6 by Suresh Babu

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3 Answers

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User acceptance testing (UAT) verifies the business functionality of software. In other words UAT verifies whether the software works for the user (i.e. whether the user accepts how the software solves a problem).
System integration testing (SIT) verifies whether the subsystems constituting the software product work as expected and work together in a streamlined manner. SIT checks whether the system (i.e. software product) and its subsystems meet the requirements, as well as operate and interoperate without technical failures (nothing crashes).

Scope

UAT has a somewhat broader scope that focuses the user-facing aspects of the software product.
SIT zooms in on the interoperation of the subsystems (software and hardware) constituting the product. SIT is more detailed, and it strives for a complete functional coverage of the system.
answer Mar 8 by Arunkumaarts
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Purpose

User acceptance testing (UAT) verifies the business functionality of software. In other words UAT verifies whether the software works for the user (i.e. whether the user accepts how the software solves a problem).
System integration testing (SIT) verifies whether the subsystems constituting the software product work as expected and work together in a streamlined manner. SIT checks whether the system (i.e. software product) and its subsystems meet the requirements, as well as operate and interoperate without technical failures (nothing crashes).
Scope

UAT has a somewhat broader scope that focuses the user-facing aspects of the software product.
SIT zooms in on the interoperation of the subsystems (software and hardware) constituting the product. SIT is more detailed, and it strives for a complete functional coverage of the system.
When is testing carried out?

UAT is carried out in the final stages of the software development cycle (before the client accepts the software).
SIT starts when the system is assembled for the first time, after all subsystems have been tested. System testing typically precedes user acceptance testing.

answer Mar 8 by Sheetal Gawade
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System Testing Acceptance Testing
1. System testing is end to end testing performed to check if the software can i buy provigil online meets the specified requirements. 1. Acceptance testing is functionality testing performed to check if the software meets the customer requirements.
2. System testing is performed by developers and testers. 2. Acceptance testing is performed by independent set of testers and also the stakeholders, clients.
3. System Testing can be both functional and non functional testing 3. Acceptance testing is pure functional testing.
4. In System testing , we test how the system is behaving a whole, the functionality and performed are checked. 4. In Acceptance testing we check if the system is meeting the business needs of the organisation, usability of the product.
5. It is performed with demo data and not the production data. 5. It is performed with the actual real time data ,production data.
6. In this testing we test the software for complete specification including hardware and software, memory and number of users. 6. Here we test the software for the user needs and if user needs are met in the developed software.
7. System Testing comprises of System Testing and System Integration testing. 7. Acceptance testing comprises of alpha testing and beta testing.
8. System testing is performed before the Acceptance testing. 8. Acceptance testing is performed after the System testing.
9. System testing involves non functional testing that is performance load and stress testing. 9. Acceptance testing involves functional testing that is boundary value analysis, equivalence portioning and decision table testing.
10. In System Testing , since it is performed by group of testers, it would contain more negative test cases. 10. Acceptance Testing contains more of positive test cases.
11. The defects found in system testing can be fixed based on priorities. 11. The defects found in acceptance testing are taken as failure product.
12. Here we test the system for all the possible dummy inputs. 12. Here we check the syste

answer Mar 10 by Sheetal Gawade
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