A procedure includes: receiving a request to monitor a target monitored item of the computer from a first information processing apparatus; inquiring the first information processing apparatus for a first monitoring condition; and determining a second information processing apparatus by referring to monitoring information. The monitoring information includes information indicating a specific monitored item and a monitoring condition for monitoring the specific monitored item in association with an identifier for identifying an information processing apparatus. The procedure further includes: instructing one of the first and second information processing apparatuses to monitor the target monitored item of the computer in accordance with the first monitoring condition for monitoring the target monitored item by the other one of the first and second information processing apparatuses; and instructing the other one of the first and second information processing apparatuses not to transmit a request to monitor the target monitored item.