PURPOSE: To simultaneously consider plural evaluation indexes by observing a change load while changing a schedule and observing a change in the schedule at real time while adjusting the load in the case of correcting a plan by an operator.

CONSTITUTION: When processing state predetermined time/completion predetermined time in each process of a lot recorded in a planning data recording part 1 is updated, a load data calculating part 2 updates the load of a lot in each process/time bucket recorded in a load data recording part 3. A load graph part 5 updates a load graph in accordance with the change of the recording part 3 and updates the data of the recording part 1 based upon a load range specified by an operator and a destination to be moved. A Gantt chart part 6 replots a Gantt chart in accordance with the updating of the data of the recording part 1 and updates the contents of the recording part 1. While moving the Gantt chart, the operator executes load adjustment by the co-operation of a series of processing.