PREDICTION DEVICE FOR OPTIMUM PARAMETER COMBINATION

摘要

PROBLEM TO BE SOLVED: To predict an optimum parameter through a small number of operation trials by converting a parameter into an internal parameter (factor) of the same level number and performing simultaneously a factor analysis based on an orthogonal plan and the searching based on a genetic algorithm. SOLUTION: A parameter conversion part 1 stores the correspondence between an original parameter and an internal parameter and performs the conversion between them. The factor level is set at 2, and an orthogonal plan is produced at a level of 2 and with the intensity of 2. Then a factor combination is produced and evaluated at a combination evaluation part 4. Based on the evaluation value of the factor combination, the average and deviation of the evaluation value are calculated at every level. The presence or absence is decided for a factor that contributes to the improvement of the evaluation value based on the selection reference. If the relevant factor is searched, its level is decided. The processing is repeated at and after the production of the orthogonal plan for other factors. If the relevant factor is not searched, the factor contribution is defined ambiguous and a combination searching part 3 searches the factor. If no remaining factor is searched, the decided factor combination is outputted to a user interface part 5.