Reasons for Automation testing over Manual testing.

Every software development group tests its products, yet delivered software always has defects. Test engineers strive to catch them before the product is released but they always creep in and they often reappear, even with the best manual testing processes. Automated software testing is the best way to increase the effectiveness, efficiency and coverage of your software testing.

Manual software testing is performed by a human sitting in front of a computer carefully going through application screens, trying various usage and input combinations, comparing the results to the expected behaviour and recording their observations. Manual tests are repeated often during development cycles for source code changes and other situations like multiple operating environments and hardware configurations.

An automated software testing tool is able to playback pre-recorded and predefined actions, compare the results to the expected behaviour and report the success or failure of these manual tests to a test engineer. Once automated tests are created they can easily be repeated and they can be extended to perform tasks impossible with manual testing. Because of this, savoy managers have found that automated software testing is an essential component of successful development projects. 

Tools user for automation testing :-
(QTP and Selenium is one the best tool in market for automation - QTP is paid and very easy to you and selenium is free and can work with multiple languages and browsers.)

HP Unified Functional Testing software, formerly known as Quick Test Professional and HP Quick Test Professional, provides functional and regression test automation for software applications and environments.HP Unified Functional Testing can be used for enterprise quality assurance.

HP Unified Functional Testing supports keyword and scripting interfaces and features a graphical user interface.It uses the Visual Basic Scripting Edition (VBScript) scripting language to specify a test procedure, and to manipulate the objects and controls of the application under test.

HP Unified Functional Testing was originally written by Mercury Interactive and called QuickTest Professional.Mercury Interactive was subsequently acquired by Hewlett Packard(HP) in 2006.HP Unified Functional Testing 11.5 combined HP Quick Test Professional and HP Service Test into a single software package,which is currently available from the HP Software Division. The integrated HP Unified Functional Testing software allows developers to test from a single console all three layers of a program’s operations: the interface, the service layer and the database layer.