Conventional long-term schedules of ship construction, which extend from half a year to one year, are daily schedules and on this time-scale they are improved by levelling the load. However, these schedules contain much buffer time in each of the building process, and often have a problem which is hard to shorten the lead time when there exits complex relations between the processes. To overcome this problem, we have developed a logic for making a long-term schedules in a finer mesh on time-scale. This enables us to analyse the bottle-neck in detail, and make a better schedule with a shortened lead time. The newly developed scheduling logic has been applied to the scheduling of the cabin installation in a cruise ship building and its effectiveness was confirmed.
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