1. A method for compressor health monitoring comprising: receiving a plurality of turbine data points, wherein each of the turbine data points comprise one or more operating parameters and at least one of a compressor discharge temperature (CTD), and one or more performance parameters; categorizing the turbine data points into a plurality of bands based on the one or more operating parameters; computing at least one statistical variability measure of at least one of the CTD and the one or more performance parameters, for each of the plurality of bands; generating an alarm indicator based on the at least one statistical variability measure.