What is STLC – Software Testing Life Cycle?

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STLC is a sequence of different activities performed during the software testing process. It’s like a roadmap for testers, helping them know what to test, when to test, and how to test, ensuring that the software you’re working on is as good as it can possibly be.

Stages of the Software Testing Life Cycle
Stages of the Software Testing Life Cycle

Stages of the Software Testing Life Cycle

  1. Requirement Analysis: This is where it all starts! Testers interact with various stakeholders—like clients, developers, and user representatives—to understand the software’s requirements. This understanding helps determine what needs to be tested and identify the right testing strategies.
  2. Test Planning: Once we know what we’re testing, we can start planning how to test it. This includes deciding on the testing schedule, resources, and tools we’ll need. It’s a bit like preparing for a journey—you wouldn’t set off without knowing where you’re going and what you’ll need along the way, right?
  3. Test Case Development: Now, we get down to the nitty-gritty. In this stage, testers write detailed ‘test cases’ that outline specific conditions under which the software should be tested. It’s a bit like writing a recipe—the clearer the instructions, the better the outcome.
  4. Test Environment Setup: This is setting up the stage where the actual testing will take place. It involves configuring the necessary hardware and software. Imagine it like a rehearsal stage for a play, where all props and backdrops are arranged before the actual performance.
  5. Test Execution: Lights, camera, action! This is where testers execute the test cases, comparing the expected results with the actual results and logging any discrepancies or ‘bugs’.
  6. Test Cycle Closure: After the tests are completed, testers meet to evaluate the cycle’s success based on certain criteria, like the quality of the testing and the time it took. It’s a bit like a post-production meeting in a film—everyone gets together to discuss what worked, what didn’t, and how things could be improved next time.
  7. Bug Fixing & Retesting: Any bugs found during testing get fixed by the development team, and then the software is retested to ensure the issues have been resolved. It’s like proofreading a document—you fix the errors you find, and then you check it again to make sure you haven’t missed anything.

While this might seem like a lot to take in, remember that each stage of the STLC is designed to ensure that the software you’re testing is the best it can be. And remember, every expert was once a beginner—so don’t be afraid to ask questions, seek help, and keep learning!


“Understanding the STLC was a game-changer for me as a beginner in software testing. It provided a clear structure and process to follow, which made my work much more effective.” — Sam, Junior Software Tester.

Expert Recommendation:

“I highly recommend all new testers familiarize themselves with the STLC. It’s a fundamental part of effective software testing and will serve as a solid foundation for your testing career.” — Dr. Maria, Senior Software Tester.

I hope you found this explanation helpful! If you have any other questions about the STLC or software testing in general, don’t hesitate to ask in the comment section below.


Avinash is the Founder of Software Testing Sapiens. He is a blogger and Software Tester who has been helping people to get thier Jobs over a years Now.

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