Abstract
Recently, many companies have accomplished high efficiency "stockless" manufacturing as a result of adopting "JIT" production system. Moreover, as the individual preference has become strong, the variation of products should be developed rapidly. Therefore, in manufacturing is often processed only 1 unit per 1 month. Suppose that KANBAN is applied to such rarely withdrawal parts, the quantities of WIP become larger in the factory. MRP/JIT method, an integrated concept of MRP and KANBAN, is proposed to solve problems caused by rarely withdrawal parts in KANBAN production system. The proposed MRP/JIT system, the improved fixed interval withdrawal KANBAN system are compared mutually under variety conditions like processed rate of parts and analyzed total operation cost. Furthermore, the efficiency of the above-mentioned methods is investigated.
