| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To control quality, within a desired range, of a product required to satisfy a plurality of qualities. <P>SOLUTION: A range of operation conditions of an operation factor whose prescribed quality falls into a desired range is calculated from process data including a product quality obtained under operation conditions of an operation factor in an iron and steel process and under operation conditions of the operation factor. A relational expression between the operation factor and the quality is obtained in a probability distribution correlation analysis method on the basis of the process data of a product to be analyzed. A degree of influence on the quality of the operation factor is calculated by using the range of the operation conditions of the operation factor and the relational expression between the operation factor and the quality. Further, a degree of quality improvement is calculated by using the relational expression between the operation factor and the quality and operation conditions of an operation factor of the product whose quality is to be improved. Moreover, an expected degree of improvement of the operation factor is calculated by using the degree of influence on the quality of the operation factor and the degree of the quality improvement. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
