Information processing apparatus, a diagnostic method, and program

The present invention can be carried out in the diagnosis of equipment more accurately. A behavior pattern extraction unit 104 extracts the phenomenon pattern of past sensor signal equipment. Related information linking unit 105 pegging based sensor signals to the maintenance history information. Symptoms pattern classification criterion creating unit 107, a phenomenon pattern extracted, the sensor signal which is the basis of the phenomenon pattern based on a working keyword included in the maintenance history information linked, classification for classifying phenomena pattern to create a standard. Symptoms pattern classifying unit 108, based on classification criteria, classifies the phenomenon pattern. Diagnostic model creation part 109, and classified phenomenon pattern, based on the work keywords, creating a diagnosis model for estimating the work keyword to be presented to the maintenance worker. .The