Change impact research support program that can be sufficiently reduced the number of steps it takes to impact studies associated with configuration management change, it is an object of the present invention that it provides a change impact research support and methods change impact research support equipment. To extract the CI there is that it has been modified with a combination of CI that has been modified in the configuration management changes each time the CI that is included in the configuration management information is modified, has been done actually. The program sets the impact higher number of the modified with a combination of the CI for CI extracted, the aforementioned large, is presented to the user as a CI of suggestions in order of impact.
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