To easily electronize information on customization.
A first holding means 1 holds an assumption information consisting of a question and an in-assumption change being the change of a program to be customized, which is previously assumed for every answer against the question. A change result editing means 4 generates a change information by making the answer against the question correspond to the in-assumption change selected by the answer. A second holding means 3 holds a change information. An out-of-assumption input/registration means 6 inputs an out-of- assumption information when the program to be customized is changed in out-of- assumption. A third holding means 5 holds the inputted out-of-assumption change information. A customization history analysis means 7 analyzes influence that the in-assumption change is affected by the out-of-assumption change based on the assumed change information, a selection change information and the out-of-assumption information.
NAKAYAMA HIROKO
UEHARA TADAHIRO
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