In the shipbuilding industry, more than 100,000 hull parts are used for one ship. Then, it is very important to control the location of the hull parts. Like mass production factory, by using the mobile IT tools like a PDA/RFID is very useful to manage the location, but it is difficult because many of hull parts are located in outdoor area, and sometimes the weather is very bad. In this research, the authors will describe the concept of location management system by using mobile IT tools and its application to the location management of steel plate.
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