Response performance of a new type of transaction processing based on a new program, when the new type of transaction processing is executed by a computer of an information processing system, is predicted. The information processing system executes transaction processing requiring access to a database system in response to an external processing request. Upon prediction of response performance each value of a plurality of parameters related to operation that affects response speed of a database system assumed in the new type of transaction processing is acquired. The acquired each value of the plurality of parameters is inputted to a predetermined evaluation formula to calculate an evaluation value related to response performance of the new type of transaction processing.