Studies on the Priority Rule for Production Planning in MRP system

"As for the conventional study of MRP system, the critical ratio rule has taken the remaining time until due date into consideration has been commonly utilized for a characteristic of the operational priority rule. In this paper, a characteristic of new priority rule was proposed in order to remove the defect of the critical ratio rule. To put it concretely, both of backorders and outstandings were introduced into this priority rule as a substitution for considering the due date. The superiority of the proposed rule over the critical ratio rule was proved by the use of the model experiments.

配送車輛の容量を考慮した相互供給システムに関する研究

本研究は,異なる経営体による相互供給システムの物流問題を対象としている。具体的には,従来の研究で扱っていなかった配送車輛の容量に着目している。この制約条件を考慮して,物流費用を定式化し,物流センタを用いた配送方式と,相互供給システムの巡回配送方式との比較を行う。そして,数値計算を行い,相互供給システムの有効性について述べる