Patent ID: 7903269

Claim:
An abnormality determining apparatus, comprising: an information obtaining device configured to obtain information of a detection subject during a preset period after a start of an initial operation of the abnormality determining apparatus at a user destination, wherein the detection subject comprises an image forming apparatus configured to form an image on a recording medium; a receiving device configured to receive, only during the preset period after the start of the initial operation of the abnormality determining apparatus at the user destination, a user input of abnormality presence information indicative of the presence of an abnormality in the detection subject detected by the user; a normal group data set constructing device configured to exclude information of the detection subject obtained by the information obtaining device when the abnormality presence information input by the user is received from information of the detection subject obtained by the information obtaining device, to generate information of the detection subject that is a collection of normal data indicating that the detection subject is in a normal state, and to construct a normal group data set based on the generated information of the detection subject; an information storing device configured to store the normal group data set constructed by the normal group data set constructing device; and a determining device configured to determine the presence of an abnormality in the detection subject by performing calculations based on the normal group data set stored in the information storing device and based on information obtained by the information obtaining device; and an image forming condition obtaining device configured to obtain an image forming condition of the image forming apparatus, wherein the normal group data set constructing device is configured to construct the normal group data set distinguished by the image forming condition comprising at least one of output image density condition and sheet type condition.