Patent ID: 7424239

Claim:
An image forming apparatus comprising: a controller for issuing commands representative of a plurality of kinds of instruction; an engine for executing image formation according to the command; a control portion for holding a condition status indicating an internal condition of the engine and a factor status indicating a factor of the condition status, or the factor status, said control portion communicating with the engine and notifying, in response to the command, the controller of the condition status and the factor status, or the factor status; and judgement means, provided in the controller, for judging whether to adjust an image formation condition of the engine or not according to the condition status and the factor status, or the factor status, wherein the control portion further holds a priority status indicating a priority of the factor, and the judgement means judges whether to adjust the image formation condition of the engine or not according to the condition status, the factor status, and the priority status, or the factor status and the priority status.