1. A method of re-executing a workflow in an image forming apparatus, the method comprising: accessing a job history of one or more workflows including a plurality of jobs, with at least two of the plurality of jobs being different operations of the image forming apparatus, and the job history comprising information about whether or not each of the workflows was executed successfully; displaying the accessed job history on a screen of the image forming apparatus, the screen comprising a menu to receive a workflow re-execution command; selecting one or more of the workflows to be re-executed or deleted from the displayed job history that displays the information about whether or not each of the workflows was executed successfully; changing conditions of an operation for re-executing the selected workflow according to one or more selections received from a displayed menu, including at least one of input conditions including at least one of a scan operation and a facsimile operation, transform conditions including at least optical character recognition, and transmission conditions including at least one of an e-mail operation, a folder operation, a facsimile operation, and a print operation; and re-executing the selected workflow according to the changed conditions.