QUALITY PREDICTION DEVICE, QUALITY PREDICTION METHOD, PROGRAM AND COMPUTER-READABLE RECORDING MEDIUM

PROBLEM TO BE SOLVED: To provide a quality prediction device for predicting quality which generates a relational expression of operation data and quality data in the case that characteristics thereof are changed according to character code information. SOLUTION: The quality prediction device is provided with: a division pattern candidate creation part for creating a division pattern candidate by dividing an overall region configured of a region in which operation variables included in operation data are set as values and a region in which code variables are set as values into a plurality of local regions; a relational expression calculation part for calculating a relational expression representing a relation between the operation variables and the code variables about each division pattern candidate; a minimum error relational expression selection part for calculating a prediction error of the relational expression about each division pattern candidate from a quality prediction value and the quality data, and selecting the division pattern candidate of the relational expression minimizing the prediction error; a learning error evaluation part for determining whether or not the convergence of the prediction error is sufficient from the comparison result of the prediction error of the division pattern and an evaluation reference value; and a quality prediction value output part for outputting a quality prediction value from the relational expression of the division pattern when the convergence is sufficient. COPYRIGHT: (C)2011,JPO&INPIT