| 摘要 |
It is also an object of the present invention to provide objective advertisement plan(s). The target specifying information storage means 2 stores information for specifying target attribution including information for specifying information delivery medium of an object to contact with correspondently with searchers' id. The search term storage means 3 correspondently stores a searcher's id, the timing of search, and the term used for the search. The extraction means 4 extracts the timing of search for such search term for each searcher's id, segments the extracted search timing for each searcher's id into a predetermined number in chronological order and then extracts searcher's id belonging to each segment. The advertising medium data determination means 5 extracts information on candidate of information delivery medium for the each segment from the extracted each searcher's id using information for specifying a target and determines candidate(s) of information delivery medium from the extracted candidate of information delivery medium.
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