There are provided: a test executing section which generates a plurality of logs when executing a coverage test for an application based on an inputted parameter; and a result processing section which generates a point candidate report based on the plurality of logs. The plurality of logs respectively indicate a call stack of a method designating the parameter as an argument among a plurality of methods called during execution of the coverage test. The call stack indicates a location on the application, in which a call of the method is defined. The point candidate report indicates a candidate for a point in the application, for which a modification is necessary when a dispatch of process is executed based on the parameter.