A control device includes a trained model for receiving a feature amount calculated from information collected from the control target to output a score, and a threshold value for determining the score An information processing device displays a feature amount related to the trained model and a score calculated from the feature amount, receives setting of a threshold value for any of the feature amount and the score, calculates a threshold value for the score from the threshold value set for the feature amount, and outputs, as a threshold value to be applied to the trained model, any of the threshold value set for the score and the threshold value for the score calculated from the threshold value set for the feature amount.