System testing of software or hardware is testing conducted on a complete, integrated system to evaluate the system's compliance with its specified requirements. System testing falls within the scope of black box testing, and as such, should require no knowledge of the inner design of the code or logic.
As a rule, system testing takes, as its input, all of the "integrated" software components that have successfully passed integration testing and also the software system itself integrated with any applicable hardware system(s). The purpose of integration testing is to detect any inconsistencies between the software units that are integrated together (called assemblages) or between any of the assemblages and the hardware.System testing is performed on the entire system in the context of a Functional Requirement Specification(s) (FRS) and/or a System Requirement Specification (SRS).

Our approach is:

Reduce the cost of change
This covers both the overall cost of the full development lifecycle and the cost of all the testing activities, such as performance testing or user acceptance testing

Increase the speed of change
This covers reducing the elapsed time spent testing and the time spent on remedial work and operational maintenance

Improve the governance of change
This is achieved through better business alignment of the testing a company performs and better management information from the testing activities throughout the projects and programmes