PROBLEM TO BE SOLVED: To change, when a trouble occurs, a business flow consisting of a plurality of business processes into a degeneracy flow at least a part of the business processes of which is different.SOLUTION: A trouble rule correspondence table 291 includes degeneracy flow information for, when a trouble occurs in a business process, specifying a business flow to be executed as a substitute for a specific business flow as a degeneracy flow for every business process of the specific business flow consisting of a plurality of business processes. When a trouble occurs in any of the business processes of the specific business flow, a trouble rule interpretation section 230 obtains degeneracy flow information corresponding to the business process in which the trouble has occurred, from the trouble rule correspondence table 291. A service control section 250 executes the degeneracy flow specified by the degeneracy flow information that has been obtained by the trouble rule interpretation section 230, as the substitute for the specific business flow.
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