Error diagnosis method, error diagnosis device, and error diagnosis program

摘要

PROBLEM TO BE SOLVED: To facilitate abnormality determination and location of an abnormal place.SOLUTION: An abnormality diagnosis method includes: a first step (S11) of calculating a value for indicating a probability distribution of a regression coefficient of a regression formula where an object variable is one of measurement items and an explanation coefficient is another measurement item; a second step (S12) of calculating a value for indicating a probability distribution of a prediction value of a diagnosis item at a point of time of second measurement, based on the regression formula, a value for indicating a probability distribution of a regression coefficient calculated in the first step, and diagnosis target data; and a third step (S13) of determining abnormality in a diagnosis item based on a first degree of abnormality by calculating the first degree of abnormality as a degree of abnormality of the diagnosis item at a point of time of second measurement, based on diagnosis target data, and a value for indicating a probability distribution of a prediction value of a diagnosis item calculated in the second step.SELECTED DRAWING: Figure 5