| 摘要 |
PROBLEM TO BE SOLVED: To carry out risk management while distinguishing an abnormal case from a normal case. SOLUTION: On the basis of data of a great number of previously designated brands constituting the portfolio, a characteristic value of a data correlative matrix is found (104-108), and a characteristic value plot formed by plotting the found characteristic value is represented by an exponential function. On the basis of a function power distribution (112) found by logarithmic transformation of the exponential function, the risk in the portfolio is managed. |
