US Patent 7774165 State monitoring of machines and technical installations

Provided is a method for monitoring measurement data by way of measurement channels. The measurement channels are processed in a plurality of time series of state values with mutually different time bases. Limit value ranges are ascertained in a learning phase and monitoring-related steps are triggered in a monitoring phase when limit values are exceeded. A good value extent is calculated for a time series with an upper and a lower limit value, with the inclusion of a limit value range which is predetermined in the learning phase and a state base value of the time series, which is determined in the monitoring phase.