If the coalition of players orders the product together, then they can reduce the inventory costs such as ordering cost and holding cost. Inventory game can be defined as the allocation of the inventory costs to the players in a fair and rational manner. The characteristics recommended for the solutions provided by the method for the inventory game are completeness, rationality, and marginality. The solutions that satisfy these characteristics are in the core, where the proportional method may depend on the allocator. This study has found out that the solutions of the proportional method with some allocators for economic order quantity model exist in the core.

• 이동주(공주대학교, Kongju National University) | Dongju Lee
• 이창용(공주대학교, Kongju National University) | Chang-Yong Lee
• 김종표(공주대학교, Kongju National University) | Jongpyo Kim