Patent ID: 6999899

Claim:
A method of operating a system to test an industrial process and/or industrial data set for determining a state of the industrial process and/or industrial data set, comprising the steps of: monitoring at least one source of industrial data provided to the system to detect at least one variable of the industrial process and/or industrial data set to provide a real signal from said at least one source of industrial data; generating a standard signal which is characteristic of the at least one variable; generating frequency domain transformation data for said real signal and said standard signal for a given time; obtaining a frequency difference function characteristic of the difference pairwise at the given time between said frequency domain transformation data for said real signal and said standard signal; operating on the frequency difference function using a computer for applying a sequential probability ratio probabilistic test analysis technique to determine a sequential probability ratio test frequency spectrum data set for the industrial process and/or the at least one source of industrial data set and/or the industrial data; and repeating the step of generating frequency domain transformation data for a new incremented time position until generation of a three-dimensional surface in frequency, time and alarm state space characteristic of a particular condition of the industrial process and/or the industrial data set and/or the at least one source of industrial data, where the z axis shows when an alarm alert state is present.