A subsistence analyzing system for determining an estimate term until an event occurs on the basis of a set of cases each including at least one attribute value indicating a feature value of a case and information on the measured actual term until an event occurs. The subsistence analyzing system comprises an estimator creating section for creating an estimator for estimating whether or not an event occurs according to the attributes of the set of cases for each actual term, an estimator selecting section for judging whether or not an estimator meets a predetermined selection condition and selecting an estimator used for calculating the estimate term, and a term calculating section for calculating the estimate term by using the selected estimator.
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