Software testing stated as the process of validating and verifying software/application/product. Software testing helps to find out the risk element at the time of implementation of the software. Software testing is a process of executing a program/application with the intent of finding bugs. Software Testing is an integral part of the Software Development Life Cycle. Software testing methodology depends on how application is tested and what part of the application is tested. There are two types of testing. 1. Black Box Testing it takes place in testing phase. 2. White Box Testing it takes place in coding phase.

The quality assurance cycle consists of four steps: Plan, Do, Check and Act. These steps are commonly abbreviated as PDCA.

The four quality assurance steps of PDCA model are as below

Plan: Establish objectives and processes required to deliver the desired results.

Do: Implement the process developed.

Check: Monitor and evaluate the implemented process by testing the results against the predetermined objectives.

Act: Apply actions necessary for improvement if the results require changes.