A method includes, based on communication times regarding an execution command and a response of each of a plurality of services included in a task executed two or more times, and on information on an information processing device that executes each of the plurality of services, generating a group of one or more services executed continuously by a same information processing device in each of the executions of the task, calculating a first processing time of an entirety of the one or more services in each group, calculating a second processing time per service obtained by dividing the first processing time by a number of the one or more services in each group, calculating an average processing time by averaging the second processing times for each of the plurality of services for each task, and outputting a specific service based on the average processing time.