Abstract: An information processing apparatus comprising processing circuitry, the processing circuitry constructs a prediction model for predicting time-series data related to a state of a device/equipment, calculates a prediction error that is a difference between a predicted value of the time-series data predicted by the prediction model and an actual value of the time-series data, divides the prediction error into a plurality of first sections in a time axis direction, calculates a state change amount of the actual value based on the prediction error divided into the plurality of first sections; and constructs a state determination model for determining the state of the device/equipment based on the state change amount.