System evaluation apparatus

A method for controlling an apparatus for evaluating a change of an existing system to a modified system by using a test system including a subsystem having the same configuration with either of the existing subsystem and the modified system, the test system including a plurality of computers connected with each other via a network, the apparatus including a memory for storing configuration information of the test system and test information and a processor, the method comprising:

• activating the test system to execute test on the subsystem, collecting test information from the test system, and storing the test result information in the memory while the subsystem has the same configuration as the existing system by the processor;
• confirming the test system has been modified so that the subsystem has the same configuration as the modified system by the processor;
• and
• activating the test system to execute test on the subsystem while the subsystem has the same configuration as the modified system, collecting test result information from the test system, and storing the test result information in the memory by the processor.