MONITORING DEVICE, METHOD FOR MONITORING, AND PROGRAM

To provide a monitoring device that can accurately determine an abnormality by a technique of determining an abnormality on the basis of the difference between a measured value and an estimated value in determination target data.SOLUTION: The monitoring device has a processor. The processor collects time-series measured values and estimated values of a parameter showing an operational situation of a monitoring target device, calculates the difference between the measured values and the estimated values, calculates a bias evaluation index showing the correlation between the variations in the measured values and the variations in the estimated values, and performs processing of determining the state of the monitoring target device on the basis of the difference and the bias evaluation index.SELECTED DRAWING: Figure 1 【課題】判定対象データの測定値と推定値の差に基づいて異常を判定する手法において、精度よく異常判定を行うことができる監視装置を提供する。【解決手段】監視装置は、プロセッサを備え、前記プロセッサが、監視対象装置の稼働状況を示すパラメータの時系列の測定値および推定値を収集し、前記測定値と前記推定値の差を計算し、前記測定値の変動と前記推定値の変動の相関性を示すバイアス評価指数を算出し、前記差と前記バイアス評価指数とに基づいて前記監視対象装置の状態を判定する処理を実行する。【選択図】図１