A color barcode can record much more amount of information than black white barcode. A routing path graph having the destination node is accepted. By using image capture and analysis, the placement of the item in the appropriate container can be verified without requiring the agent to scan or otherwise identify the container into which the item was placed. By using a segment-forming method, the size of the sputtering target can be up to 6 m\xd75. In this manner the battery capacity is not affected by the capacity of the weakest cell.