A method of generating common trouble case data for managing a plurality of systems. The method includes (a) obtaining first identifiers of actual system components and a second identifier of a template from a system data storage unit, (b) obtaining third identifiers of definitional system components from a template data storage unit on the basis of the second identifier, (c) selecting, by a computer, a first identifier subset among the first identifiers on the basis of the third identifiers, and (d) selecting, by the computer, a first trouble case data subset among a plurality of first trouble case data pieces on the basis of the first identifier subset to generate the common trouble case data. In the above (c), the first identifiers of the first identifier subset are identical to the third identifiers. In the above (d), the first trouble case data subset includes the first identifier subset.