To provide an influence examination system, an influence examination method, and an influence examination program for predicting an influence range of information used in a system in which a plurality of information processing is executed.SOLUTION: A control unit 21 of the influence examination system 20 identifies all programs and output files that use a file to be examined in a parameter file in which file identification information to be input to a program used for a job is recorded, by using a job report information storage unit recording output information including item information to be output in the identified program and input information including item information for deriving the output information, sequentially searches, from output information in which the input information is not recorded and the item to be examined is recorded, the input information from which the output information is derived, identifies an output item in an output stage, and outputs an influence range including specific information of the output file and the output item.SELECTED DRAWING: Figure 1
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