1. A scenario creating apparatus which creates a scenario for verifying operation of an information processing system in which a plurality of servers including a database server are coupled, comprising a processor to execute a process including: collecting messages transmitted and received between the plurality of servers, when operation of the information processing system is being verified by a terminal apparatus that performs verification of operation; associating the collected messages with each other; sorting work models in ascending order of time at which access is made to the database server, the work models each being a group of the associated messages; and creating the scenario based on the sorted work models.