Patent ID: 8064782

Claim:
A management device for an image forming apparatus, comprising: a status data collection unit that receives multiple types of status data from the image forming apparatus and stores received status data in a status database; a target data creation unit that creates multiple types of target data based upon said multiple types of status data; a first stage determination unit configured to generate a first determination by determining said multiple types of target data as being above or below reference values set for each type, and configured to assign to each of the multiple types of data an abnormal occurrence tendency value based on the first determination; and a second stage determination unit configured to generate a second determination using majority logic for abnormal occurrence prediction by generating a plurality of weighted tendency values by combining the abnormal occurrence tendencies assigned by the first stage determination unit to weight values set for each of the multiple types of target data, generating a prediction indication value based on the plurality of weighted tendency values, and generating, as the second determination, prediction determination information based on the prediction indication value.