1. A method for monitoring an operating condition of a wind turbine, comprising: capturing measurement data and operating condition parameters by various sensors and recording in memory; assigning the captured measurement data to a correct one of a plurality of bins by: selecting a subset of the operating condition parameters by a processing unit; calculating a set of n characterizing moments based on the selected subset of the operating condition parameters by the processing unit, wherein the n characterizing moments comprise a set of values that characterize operational states of the turbine; defining a finite n-dimensional space, each of the n-dimensional space representing possible values for one of the n characterising moments by the processing unit; sub-dividing the n-dimensional space into the plurality of bins by the processing unit, each of the bins representing a n-dimensional interval and defining an acceptable range for the set of the n characterizing moments that characterize operational states of the turbine; defining the n-dimensional interval by n one-dimensional intervals by the processing unit, each of the n one-dimensional intervals representing an interval in one of the n-dimensional space; determining if the set of the characterising moments falls within the acceptable range for one of the bins by the processing unit; accepting the set of the characterising moments and the captured measurement data if the set of the characterising moments belongs to the one of the bins by the processing unit; assigning the captured measurement data to the correct one of the bins based on the acceptable range determination to correlate the captured measurement data with the operational state of the turbine represented by that bin; and determining if required input values are available for a selected evaluation method from the captured measurement data and evaluating the captured measurement data correlated with operational state of the turbine by bin according to the selected evaluation method.