A model to predict the results from the event item and the value of the event item, simply compared with the case of applying an information processing capable of generating a generic rules that can improve the accuracy of the results to predict to provide a device. Reception means An information processing apparatus, the tree accepts event data having the values ​​and results of the plurality of event items and said event item, model generating means for combining the value of said event fields and said event item generates a model having a structure, extracting means, a result obtained by applying the values ​​of event items and said event fields to said model, the rate of matching with the results in the value of said event fields and said event fields in advance when than the rate defined at atmospheric or above, extracts the combination of the values ​​of event items and said event item in the tree as a rule candidate, generic rule generation means, a general rule from multiple rules candidate generated. .FIELD 1