Image forming apparatus having functional redundancy system.

摘要

An object of the present invention is to provide an image forming apparatus having a functional redundancy system incorporated therein and comprises a function which can be substituted for a particular function of the apparatus. The apparatus is represented in the form including functions using an FBS diagram (diagram comprising functions, behaviors and states) and the FBS diagram is stored. In cases, for example, a case where a fault occurs and a case where a particular part is stopped, a function which can be substituted for a particular function is retrieved on the basis of the FBS diagram stored as required. The apparatus is operated again using the substituted function retrieved.