jd is changed to the time t 2 and the expected starting time of the job je is changed to the time t 1 in this case the predicted ending time of the job je is the time t 2 and is not over the expected ending time t 2 of the job je further the predicted ending time of the job jd is the time t 3 and is not over the expected ending time t 4 of the job jd procedure for managing jobs by means of the job management device 201 then a procedure for managing jobs by means of the job management device 201 of the second embodiment will be explained fig1 is a diagram illustrating an example of an operational flowchart for managing jobs by means of a job management device according to an embodiment in the flowchart depicted in fig1 choose a job j to be processed by means of the choosing unit 501 at first step s 1501 then set priorities to respective members of a group of machines to be conceivably loaded with the job j by means of the job management device 201 step s 1502 further set a threshold of an amount of work to be loaded onto each of the members of the group of machines to be conceivably loaded with the job j by means of the job management device 201 step s 1503 further set upper and lower limits cmax.