A method is provided that includes selecting a desired person to be requested to carry out troubleshooting from plural requestable persons on the basis of trouble information of a problem that has occurred in a device, notifying a request destination user terminal of the desired person that the problem has occurred, judging whether troubleshooting has been completed or not on the basis of a response from the request destination user terminal, selecting a new desired person to be requested to carry out troubleshooting if troubleshooting has not been completed, and notifying a request destination user terminal of the new desired person that the trouble has occurred.
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