To provide a model training method capable of building a high-accuracy model for analyzing effects of communication setting parameters on optical signal transmission processing, a parameter analysis method, a parameter analysis program, and a parameter analysis apparatus.SOLUTION: The parameter analysis method includes steps of: training a model that outputs an index value relating to characteristics of an optical signal; and varying the characteristics of the optical signal used for training the model, to be executed by a computer or electronic circuit.SELECTED DRAWING: Figure 15
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