To automatically generate a tree structure which classifies situations efficiently based on an objective standard by evaluating a generation situation and providing feedback to reduce many decisions and much labor/time by an analysts, reduce calculation amount needed to generate the tree structure which classifies the situations considering occurrence probability, and achieve improvement of objectivity/accuracy and man-hour reduction/calculation time reduction, etc.
An automatic generation program of a tree structure comprises: a retrieval step of retrieving an initial condition of an event input from input means; a branch creation step of creating an initial branch based on the initial condition; an evaluation value calculation step of calculating an evaluation value of the branch; an evaluation value difference calculation step of calculating the difference of the evaluation values of the adjacent branch; a branch addition step of adding a new branch between the branch with the biggest evaluation value difference acquired in the evaluation value difference calculation step; and an output step of outputting information acquired from a tree structure comprising the new branch added in the branch addition step.
YAMATO HIROYUKI
TSUNODA KOHEI
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Yoshihiro Shimizu
Yuji Tsujida