A storage part stores correspondence information on incorporation or change in processing sequence of processing elements. An acquiring part acquires a target processing element group. An extracting part extracts the correspondence information on the processing elements included in the target processing element group. An incorporation determining part determines a set of processing elements to be incorporated in the target processing element group on the basis of the information on the incorporation of the correspondence information. An updating part updates the processing elements included in the target processing element group and the correspondence information of the processing elements included in the target processing element group based on the set of processing elements. A processing sequence determining part determines the processing sequence of the processing elements included in the target processing element group updated on the basis of the information on the change in processing sequence in the correspondence information updated.