In one embodiment of a liquid processing apparatus, a cleaning unit 12 includes a rotary plate 61, supporting members 64a, holding members 64b, a chemical nozzle 51 for supplying a wafer W with a chemical liquid, a spring 120 and a pressing mechanism 121 both of which moves each of the holding members 64b. The method includes characterizing the measured load on the network, which may include background load data obtained over time, and may further include directed load data representative of a transaction-level event. The viewer at the client computer generates a unique viewer identifier identifying the client computer, and sends that identifier to the web site for registration with the respondent identifier. If one or more of the utilization values exceed specified thresholds for the respective resources, then an alert may be generated.