In the present invention, a data storage unit stores a manufacturing condition for a product, a setting condition for facility equipment, and, as actual results data acquired from measurement equipment, time-
series data for the time of manufacturing. A quality
abnormality factor
estimation calculation unit acquires a quality
abnormality site of an abnormal product of which a quality evaluation value calculated from
quality data exceeds an allowable range. The quality
abnormality factor
estimation calculation unit constructs a quality abnormality factor
estimation model on the basis of the
time series data as relates to a normal
product group or on the basis of the manufacturing condition and setting condition, estimates a factor candidate for a quality abnormality on the basis of the constructed quality abnormality factor estimation model, and calculates the degree of relevance of the estimated factor candidate to the quality abnormality. A display information generation unit generates information for displaying, on a display unit, the
quality data of the abnormal product, the quality abnormality site, the
time series data or the manufacturing condition and setting condition, and the factor candidate and degree of relevance estimated and calculated by the quality abnormality factor estimation calculation unit.