Software testing begins with the integration-testing phase, which integrates the individual units coded and tested during the implementation phase and ends with acceptance testing of the finished system.

Test plans and procedures are developed to ensure that all requirements are being tested and verified. In this phase units are combined into modules, and modules are combined to make up a build, which is tested in turn and certified. Multiple builds may be integrated and tested before a deliverable release is produced.

The software testing methodology encompasses the following types of testing:

· Integration Testing
· Regression Testing
· System Testing
· Acceptance Testing