Parameter search device and parameter search method

A parameter search method by a parameter search device, the method comprising:

• collecting, by processing circuitry, an operation result including parameters indicating an operation condition of a mechanical device;
• acquiring, by the processing circuitry, evaluation values of the parameters obtained by using the operation result;
• and
• searching, by the processing circuitry, for the target parameter from the parameters indicating the operation condition of the mechanical device, wherein
• the processing circuitry
• predicts, when a plurality of search candidates for the parameters and the evaluation values are input, a relationship between the parameters and the evaluation values in the search candidates by using a machine learning model that outputs a relationship between the parameters and the evaluation values in the search candidates,
• compares a prediction result of the machine learning model with a search best having a maximum evaluation value among the parameters obtained by searching, and uses a number of the search candidates whose evaluation values exceed the search best as a search end index, and
• determines whether or not to continue searching for the parameter on a basis of a comparison result between the search end index and a threshold.