An image forming apparatus includes: a display device that displays an operation screen with respect to a user; an input device that receives an input operation from the user; a storage device; a work amount log table management circuit that specifies, for each job, an operation type and required time of each of a series of user operations made before executing the job, and stores the operation type and the required time in the storage device as a work amount log; and a work amount calculation circuit that reads out the work amount log from the storage device, specifies, based on the operation type in the work amount log, operations that can be substituted by a workflow that uses an operation aid function registered in the storage device out of the series of user operations, and proposes the substitution of the specified operations by the workflow to the user.