PROBLEM TO BE SOLVED: To specify an influence range when changing a design.SOLUTION: An information processing device 1, when accepting a request to search for a design specification related to a first item of a first design specification including a plurality of items, specifies a function corresponding to the accepted first item from a relation definition map 125 in which identification information of an item is associated with a function, extracts a design specification in which identification information of an item corresponding to the specified function is registered from a storage unit 12 storing the design specification, and outputs it as a design specification related to the first item.
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