In software testing, encountering bugs is part of the journey not a failure. But how a bug is identified, tracked, and resolved determines the efficiency and quality of the development process. This journey a bug takes from discovery to closure is known as the Bug Life Cycle or Defect Life Cycle.
In this blog, we’ll break down each stage of the bug life cycle with real-world examples that make the concept easy to grasp.
What Is the Bug Life Cycle?
The Bug Life Cycle is a sequence of stages that a software defect goes through during its lifetime. It begins when a tester identifies a bug and ends when the issue is resolved and verified.
Understanding this cycle ensures better communication between testers, developers, and stakeholders and helps avoid unresolved issues creeping into production.
Stages of the Bug Life Cycle (With Examples)
1. New
A bug is reported for the first time.
Example:
A tester notices that the “Add to Cart” button on an e-commerce site doesn’t respond when clicked and logs the bug in the tracking tool.
2. Assigned
The bug is assigned to a developer or a team member for analysis.
Example:
The QA lead assigns the “Add to Cart” bug to the frontend developer responsible for UI behavior.
3. Open
The developer starts working on fixing the bug. It’s officially acknowledged as valid and will be addressed.
Example:
The developer checks the button’s event listener and notices that a script wasn’t loading properly.
4. In Progress / In Development
The bug is being actively fixed.
Example:
The developer adds the missing JavaScript and checks its functionality in a development environment.
5. Fixed
The developer resolves the bug and marks it as “Fixed.”
Example:
After the fix, the developer uploads the corrected code and changes the bug status.
6. Retest
The QA team tests the fix to verify if the issue has truly been resolved.
Example:
The tester tries the “Add to Cart” button again. This time, the item moves to the cart successfully.
7. Verified
The tester confirms the fix works and the bug no longer exists.
Example:
After multiple checks in different browsers, the tester marks the bug as “Verified.”
8. Closed
The bug is closed officially after verification.
Example:
Once the bug is confirmed resolved, the project manager closes it in the tracking system.
Alternative Bug Statuses:
- Rejected: The developer disagrees with the bug or considers it invalid.
- Duplicate: The same bug has already been reported.
- Deferred: The bug is valid but low priority and will be fixed in a later release.
- Cannot Reproduce: The bug cannot be reproduced with the provided steps.
Real-World Insight
Imagine you’re ordering food via a mobile app. You click “Place Order,” but nothing happens. You report it, the dev team investigates, fixes a JavaScript error, and releases a new update. QA then confirms the fix. This entire journey is the bug life cycle in action.
Why It Matters
- Ensures accountability at every stage
- Promotes transparency within the team
- Prevents leakage of defects into production
- Helps track and prioritize issues based on severity and impact
Final Thoughts
The bug life cycle is more than just a checklist—it’s a structured process that drives consistent, quality-focused software development. For QA professionals, developers, and project managers, understanding this life cycle helps foster better communication and ensures that no bug is left unresolved.
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