Explain Role of Testing in SDLC? Why Testing is important in SDLC

Testing plays an important role in SDLC and it is very crucial because in SDLC, testing improve reliability, performance and some other factors that may require during this process. Here, I am writing post Role of Testing in SDLC with Importance so that apart from role, you can also learn why testing is important in SDLC.

Role of Software Testing in SDLC – Software Development

Below are given some important roles that are played by the testing in the development of software (SDLC)

1. One of the important role plays by testing in SDLC is that it, examines code/program for discovering problems and errors early in the system.

2. Another role is, testing always simulating a system/application to perform a program operation.

3. Software Testing always evaluates the capabilities of the code/program over entire products.

4. Another main role is that, testing always helps in reviewing of requirements and design as well as executing the code.

5. Testing is also important in measuring system/application functionality and quality of the product/project.

6. Testing also plays important role in lowering the maintenance cost of the software product/project.

7. It also helps in providing interaction between development and users.

Importance of Software Testing in SDLC – Software Development Life Cycle

Software Testing is considered as the one of the important and necessary phases in SDLC because of the following reasons given below:

1. Testing always helps to verify that complete software requirements are implemented correctly or not, means it is implemented according to the defined requirements or not.

2. Testing definitely helps in identifying defects/bugs and ensuring they are recognized/addressed before software deployment stage.

3. Testing also demonstrates that software/application appears to be working according to specifications and the performance requirements that have been defined is also met.

4. One of the main reason why testing is important in SDLC is, testing always helps to verify proper integration and interaction of each component in the system.

Important Note

As you know Software Testing has become one of the crucial parts of development and it is better to start testing from the very early development phase in order to avoid future difficulty by correcting the bug/defect at the final/last stage.

If any defect/issue is found and fixed after development, then the cost of correction will be much higher than the cost of fixing it at earlier stages of development.


At end we conclude, this is all I know regarding Role of Testing in SDLC and why Testing is Important in SDLC, but if you know better points on these popular terms, than discuss your thoughts in the comments section below to help others. Your feedbacks are also welcomed for this very popular post.

What are the Benefits of Regression Testing? Why we Perform Regression Testing?

Regression testing may definitely be performed manually, and it is also performed by re-executing a subset of complete and full test cases or by using some sort of automated capture playback tools too.


1. Regression testing increases our chances of detecting bugs caused by changes to a software and application- either enhancements or defect fixes. Also keep one thing in mind that we also don’t give any sort of guarantee that for performing regression testing there are never any sort of side effects also.

2. Regression testing also detects undesirable side caused always by changing the operating environment. 

3. The set about regression test is much useful for a new way about doing integration testing. This new mode is quite faster and little confusing than the old way about doing integration testing- but you always need a some sort of set about regression test to do it.


Regression testing will be considered after a bug fixed or when any area of functionality changed. During bug fixing method some part of coding may be changed or even functionality may be also manipulated so due to this change we have to perform Regression Testing.


At end we conclude that regression testing may be considered manually or using some sort of automated tools too.

The purpose behind regression testing is very simple and straight. We obviously know that changes to an existing sort of system often cause some other things to break and decline.
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