Defect density in software testing refers to the number of defects or bugs identified in a software application relative to the size of the software, typically measured in lines of code (LOC) or function points. It is used as a metric to assess the quality of the software and the effectiveness of the testing process.
The formula for calculating defect density is:
Defect Density=Number of DefectsSie of the Software (LOC or function points)
A lower defect density suggests better software quality, whereas a higher density may indicate a need for further improvements in development or testing practices.
What is defect leakage in software testing?
Defect leakage in software testing refers to the percentage of defects that were not identified in the current testing phase and are instead found in a subsequent phase. It is an important metric because high defect leakage indicates that issues are being missed during testing, which can lead to costly consequences later in the development cycle.
Formula for Defect Leakage:
Defect LeakageDefects found during the next phase(Defects found during testing+Defects found during the next phase)×100
Example:
If the testing team identified 100 defects during system testing, and the UAT team finds 25 defects that should have been caught during system testing, the defect leakage percentage is calculated as:
Defect Leakage=25(100+25)×100 = 20%
This means that 20% of the defects that could have been identified in the system testing phase were missed and leaked to the UAT phase. Ideally, defect leakage should be minimal to ensure the quality and effectiveness of the testing process.
What is the defect life cycle in software testing?
The defect life cycle in software testing refers to the various stages a defect goes through from its identification until its resolution. It helps track the status of defects for proper handling and resolution throughout the development and testing process.
Here are the typical stages in the defect life cycle:
- New: The defect is identified and logged into the defect tracking system. It has not yet been reviewed or assigned for resolution.
- Open: The defect is reviewed, and its severity and priority are assessed. It is marked as ‘open’ for the development team to fix.
- Assigned: The defect is assigned to the appropriate developer or team responsible for fixing it.
- Fixed: The development team resolves the issue by modifying the code, and the defect is marked as ‘fixed’.
- Retest: The testing team retests the defect to confirm that the fix works and the issue has been resolved without causing new problems.
- Reopened: If the defect is not fixed properly, or the issue persists, it is marked as ‘reopened’ and sent back to the developer for further investigation.
- Verified: Once the fix is validated and the defect is confirmed to be resolved, it is marked as ‘verified’.
- Closed: The defect is officially closed once it is fully resolved, retested, and verified by the QA team.
How does QA Touch help to find defect life cycles in software testing?
QA Touch simplifies this life cycle by providing tools for defect logging, prioritization, tracking, and reporting, ensuring smooth collaboration and communication between teams. Real-time updates allow for quick identification of issues and better defect management, optimizing the quality assurance process.
