Difference between SDLC and STLC
In the below table, we have listed some of the important difference between the Software Development Life Cycle and Software Testing Life Cycle:
| S.NO | Comparison basis | SDLC | STLC |
|---|---|---|---|
| 1. | Explanations | It is primarily connected to software development, which means that it is the procedure of developing a software application. | It is mainly linked to software testing, which means that it is a software testing process that contains various phases of the testing process. |
| 2. | Representation | SDLC stands for Software Development Life Cycle. | STLC stands for Software Testing Life cycle. |
| 3. | Resources | While performing the SDLC process, we needed a greater number of developers to complete the development process. | The STLC process needed a smaller number of testers to complete the testing process. |
| 4. | Focuses on | Besides the development phase, other phases like testing are also included. | The STLC concentrate only on testing the software. |
| 5. | Objective | The objective of the Software development life cycle is to complete the development of software successfully. | The objective of the Software testing life cycle is to complete the testing of software successfully. |
| 6. | Help in | The SDLC will help us to develop a good quality software product. | The STLC will helps to create the software bug-free. |
| 7. | Different phases | The various phase includes in Software Development Life Cycle are as follows:Requirements CollectionFeasibility StudyDesignProgramming or CodingTestingInstallationMaintenance | The various phase includes in Software Testing Life Cycle are as follows:Requirement collection or System studyTest PlanWrite test caseTraceability MatrixDefect TrackingTest Execution ReportRetrospect meeting |
| 8. | Requirement collection phase | In the SDLC Requirement collection phase, the BA [Business Analyst] and PA [ Product Analyst] will collect the requirements and interpret business language into software language. | In the Requirement Analysis phase of the STLC, the QA [ Quality Assurance] team will study requirement documents and prepare the System Test Plan. |
| 9. | Designing phase | Based on the requirement understanding, the development team will develop the HLD [High-Level Design] and LLD [Low-Level Design] of the software. | Generally, in STLC, the Test Architect or a Test Lead plan the test strategy. And also finds the testing points. |
| 10. | Coding phase | In the SDLC coding phase, the developer will start writing the code as per the designed document and beginning of building the software. | In STLC, the QA team writes the test scenarios to authenticate the quality of the product. |
| 11. | Environment Set up | After writing the code, the development team sets up a test environment with the developed product to validate the code. | Based on the prerequisites, the Test team confirms the environment set up. And do one round of smoke testing to ensure that the environment is stable for the product and ready for testing. |
| 12. | Testing Phase | Once the environment has been set, the test engineer will perform various types of testing, such as Unit, Integration, System, Retesting, Regression testing, and so on. And the development team is also involving to fixing the bugs and report back to the tester. | Based on the test cases, the tester will do one round of integration and system testing. While performing the testing, if they encounter with any bugs, it will be reported and fixed after the retesting. |
| 13. | Deployment/ Product Release phase | In the SDLC deployment phase, when we received sign-off from various testing teams, the application is deployed or installed in a production environment for real end-users. | In STLC, the Smoke and sanity testing are performed in the production environment as soon as the product is deployed. And the testing team will prepare the test reports and matrix to analyze the product. |
| 14. | Maintenance Phase | Once the product has been deployed, the development team includes support and release updates. | To check maintenance code deployed, the QA team performs the regression suites. |
| 15. | Performed | The SDLC phases are done before the STLC phases. | The STLC phases are completed after SDLC phases. |
