System Testing

System testing is done by a second party, usually either the analyst or a tester. The objectives of system testing are as follows:

To check that programs have been properly tested
To check that links between different parts of the system work
To check that the system design works, that is, to execute all of the programs in the system, with realistic data, in a realistic order
To check that each program has the correct effect upon the data it handles, that is, that the database is updated correctly and that all calculations are correct
To test for arising conditions due to interaction between different programs, or different invocations of the same program, including record locking and deadly embraces
To test for arising conditions due to large volumes of data, including level breaks, page overflow, and exceeded commit maxima