The document emphasizes the importance of regression testing in software development as a key maintenance activity to ensure new updates or features do not disrupt existing functionalities. It outlines how testing should be incorporated at various stages of development and highlights four main benefits: ensuring bug-free performance, maintaining application stability with new features, detecting performance issues, and identifying higher-risk areas in the application. Organizations are encouraged to engage with professional testing services for effective implementation of regression testing strategies.

1. CONCLUSION
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Regression testing plays a pivotal role in software testing simply because whenever there are changes or updates
being done to the code or new features are being added up, then regression testing needs to be performed. This
testing method ensures that the software product or application is bug-free and has no issues or defects in it. This
testing method makes sure that the software product or application that is built is reliable and stable. In this article,
you will get to know about the importance of performing regression testing.
What is regression testing?
It is a testing method that makes sure that new changes or updates done to the code do not alter or modify the
existing functionalities of the software application. Regression testing is iteratively applied whenever the software
is being revised. Here revision refers to time variation of the evolving system.
The importance of regression testing:
The growing
importance of
Regression Testing
This testing method is considered to be a key maintenance activity, wherein a test suite is run repeatedly whenever
the program’s execution environment and/or program under test changes. When a regression test suite is
performed whenever a new feature has been introduced, a tester can be certain that the modification in the program
does not alter the existing functionalities of the software product or application.
If the organization is spending huge amounts on software development, conducting regression testing is
considered to be a strategic move. Those test cases are taken into consideration that needs to be re-executed so
that the behavior of the test can be verified that has been modified.
The right context to perform regression testing:
Regression testing is carried out at different phases and different levels (module level, system level, component
level) of the software development process. There are some organizations that carry out regression testing at the
earlier stages of the software development, and there are some organizations that carry out regression testing at
the later stages of the software development. There are even some organizations that perform regression testing
throughout the software development process.
When regression testing is carried out at the earlier stages, then defects can be detected and fixed. Regression
testing can be carried out at every point of software integration and maybe on certain specific timeframes. Some of
the effective strategies for regression test selection are full retest of the critical safety units, ad-hoc selection and a
combination of dynamic and static selection. A project may include manual or automated regression testing
depending upon the project scope and other parameters.
Following are the four key points that depict the importance of regression
testing:
1. A bug-free performance is ensured: When a new feature is introduced, chances are it may impact the entire
system Regression testing is performed by testers to make sure that the system or application’s performance is not
affected, despite modifying or updating the code. This will also ensure that if there are any new bugs that have been
detected, then they will be fixed at the earliest.
2. Adding a new feature will not affect the application: Developers know that the implementation of regression
testing will align new functionalities with the old ones.
3. Performance issues are detected and fixed: Even if no major code changes have taken place, it’s considered to
be a wise move to run a regression test, so that at least a performance defect can be identified. The original test
suite can be retested, which in turn saves time for the developers as they do not have to write new cases.
4. The specific parts of the application that are at a higher risk are defined: Through the platform of regression
testing, developers will get to know which parts of the application or system are vulnerable to changes.
01 02
03 04
A bug-free
performance is ensured
Adding a new feature will
not affect the application
Performance issues are
detected and fixed
The specific parts of the
application that are at a higher
risk are defined