There is an entire phase in the SDLC dedicated to software testing. Traditionally, it's done after the developers have finished building the software – it's handed over to the testing team to perform tests on it. This is, in my opinion, the most important part of the SDLC process.
The reason it's so important is that it is the major factor in getting good quality software. Developing software that works and works well is the ultimate aim of a project, and the testing stage is where this is done.
The software testing phase can be divided into smaller stages, each of which has their own importance:
Unit Testing - testing each element of the software individually, to check that it works correctly in isolation.
System Testing - testing the entire system as a whole, guaranteeing all of the components work as required.
Regression Testing - testing the entire system against a pre-defined list of tests, to ensure the new changes don't impact existing functionality. This is essential for upgrades and updates to the software.
These are the main types of software measurement and each of them is important. I believe there are three main reasons that we do software testing.You can navigate to http://daemon.co.in/services/technologies/crm/ in order to know more about software testing.
The aim of software testing is to guarantee good quality software. Good quality software means it has fewer defects or issues, it works well and does what it demands to do. When you do software testing as part of a development project, you are aiming to pick up and find all of the issues in the system before it is released to the end users.