Importance Of Software Testing In SDLC And Early Stage Testing

Why testing is done?

1. To identify the defects

2. To make a software bug free

3. To cover all the scenarios of the product

4. To identify the changes occur while user use the application

5. To make good relation with the client by delivering quality product

6.To check product is working according to the specification

7. To check the performance on the large number of people

8. To avoid problems which user can get during the use of the product

Why we do testing in early stage:

Testing should be done in early stage , there are following reasons of doing so-

Expected:

In the software development life cycle , First we do the planning in which we identify the needs , the resources we estimate the total time required for the project, then analysis will be done followed by the code build and then testing is come in the picture but this is not going to happen.

Reality:

Planning , analysis and coding take a long time  and then tester get very less time to do testing , in this less time period , we are unable to deliver less quality product to the customer due to this we start testing in early stage , due to this testers get enough time to test the product and customer will also get quality product on time

In the above pictures we can see clearly how expected and actual vary in testing time

Second most important reason of early testing is-

To reduce the cost of the testing:

It will be 50 % cheaper if we start testing early , It is difficult and time  consuming to change the requirement or to fix the bug in the maintenance , if we are able to fix it on early stages it will be  cost effective and good practice and we are able to deliver the quality product on time.