サプライチェーンにおいて全体利益の最大化を追求することが多いのが現状である．全体の期待利益が如何に優れていても，各拠点での考慮や拠点間の連携が足りなければ，拠点間で利益の過度の不平準化が生じてしまう．特に，経営環境の激しい変化により，対応能力の弱い拠点がさらに弱くなっていく恐れがある．弱い拠点が継続的に赤字を発生し，企業全体の収益性は外から見るときは確保されていたとしても，サプライチェーンの内部の資金，資源，労力バランスは悪化していることになる．
本研究ではそのような問題点を解決するために，サプライチェーン再設計の研究で広く用いられる数理モデルによる最適化に加え，経営上の視点で問題を分析すると共に各拠点の不採算を発生させないような新たな目標を加え，全体利益最大化かつ赤字拠点が発生しない生産計画方式の構築を目指している．このように，経営環境の大きな変化に対応し，①同時決定の手法を開発し，グローバル生産ネットワークの全体利益を上げる，②全体利益最大化だけでなく，各拠点の不採算を考慮して新たな目標を加え，③経営階層で固定された要素を計画階層に入れ込んで統合決定などの意思決定により拠点の不採算を抑制するモデルの構築が問題解決につながると考える．
初年度はこれらを検討するための物流機能を考慮してモデリングした．グローバル化に伴い，物流コストがコスト全体に占める割合が大きくなっており，生産計画における物流プロセスの重要性が増大しているための物流機能を考慮した統合生産計画によって，輸送モードの選択と輸送経路の選択が生産計画に対して非常に重要であることが検証できた．

Since the complexity ofglobalization and the importance of the transportation process, global manufacturersneed to consider production planning with complex transportation situation. Theconstant value of transportation process is not accurate and leads to totalcost increasing. Corresponding to different supplying network, appropriatetransportation modes with nonconstant value should be considered withproduction planning simultaneously.The proposed model aims toassist managers to make decisions about production allocation, transportationmode selection, shipping contracts by volume with carriers and vessel companiesunder a given network.This study develops a globalproduction–shipping planning model that incorporates a decision ontransportation mode after considering the cost function of differenttransportation modes from the shipper’s point of view. We propose trampshipping, liner shipping mode into production-shipping planning, consideringtransshipment and consolidation to exploit economies of scale under a givennetwork. We present mathematical formulations of tramp, liner modes. In orderto verify the effectiveness of the proposed modes, we present a practical casestudy that is motivated by a real-world example. The two modes are compared anddiscussed in numerical examples. The result of this study was presented in the 9th International Conference on Operations andSupply Chain Management.

One of the main challenges for the manufacturing industry is to ensure the appropriate allocation ofbenefits to all subsidiaries to achieve the ideal pattern of rapid and sharedgrowth. Transfer price, which is the internal price among subsidiaries of aglobal manufacturing firm, is an important financial and business issue.However, most previous studies simply assume transfer prices. Our study revealsthat transfer pricing can lead to different total profits of global supply chainsand different profit allocation effects on subsidiaries. Furthermore, the exchangerate is also considered with production planning since it is treated as animportant global factor that can cause the profits of all subsidiaries tofluctuate. We add exchange constraints on both manufacturing and salessubsidiaries to reduce the inappropriate allocation of profits amongsubsidiaries. A profit allocation approach is proposed that considers transferpricing and exchange rate simultaneously with production planning. The model isformulated using nonlinear programming with a nonconvex objective function andnonlinear constraints. However, we overcome modeling challenges using piecewiselinear modeling and are able to obtain mixed-integer linear programming (MILP)model, which can be solved using a linear programming solver. The result of this study was presented in 25th International Conference on Production Research (ICPR).