EXISTENCE ANALYSIS METHOD, SYSTEM, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To highly precisely estimate a distribution of departure probabilities.;SOLUTION: A data acquisition unit 24 acquires data items of plural customers. A parameter initial value designation unit 26 designates an initial value of a distribution parameter, which represents a distribution of departure probabilities of a phenomenon and relates to a steady factor x, for each of steady factors x, and designates an initial value of a distribution parameter, which represents a distribution of departure probabilities of a phenomenon and relates to a non-steady factor y, for each of non-steady factors y. A model estimation unit 30 determines a factor, to which a customer belongs, for each of customers, updates the distribution parameters of the steady factors x, updates the distribution parameters of the non-steady factors y, determines the distribution parameter of each of the steady factors x on the basis of the repeatedly updated distribution parameters of the steady factors x, and estimates a parameter that determines the distribution parameters of the non-steady factors y on the basis of the distribution parameters of the non-steady factors y repeatedly updated by non-steady factor distribution parameter updating means.;COPYRIGHT: (C)2015,JPO&INPIT