A computer-readable recording medium storing a program for use in a computer with (i) a storage unit having a hierarchical data which represents hierarchical configuration of a number of components, which are interconnected to form a network, in such a manner that if any one of the components is a cause component, the cause component is assumed to affect components in a rank identical with or lower than the rank of the cause component in the hierarchical configuration and (ii) an information input unit inputting the computer a piece of cause information, which indicates the cause component, and one or more pieces of effect information, each of which indicates one of the number of components affected by another one of the number of the components, collected from the network, said program supportively determining a piece of actual effect information, which indicates a component actually affected by a cause component, and instructing a computer to carry out the following functions of:
- (a) retrieving data of components which are assumed to be affected by the cause component from the hierarchical data in the storage unit of the computer, based on the piece of cause information inputted by the information input unit;
- (b) extracting a piece of effect information which indicates the components assumed to be affected by the cause component from the pieces of effect information inputted by the information input unit based on the data of the components retrieved by said function (a);
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- (c) determining the piece of effect information extracted by said function (b) as the piece of actual effect information.