動的環境下における部門間生産スケジュールの最適化についての研究

摘要

Under the volatile economic situation in recent years, manufacturers need to have a high level of flexibility to manage a wide variety of products in varying quantities within a short delivery lead time. But in dynamically changing manufacturing environment, it is quite difficult to optimize interdivisional scheduling which reduces total manufacturing cost of all divisions such as raw material procurement, machining, assembling and shipping following fluctuations in demand. To solve this problem, we propose a new interdivisional scheduling method which decomposes the whole problem into process-dependent problems using inter-process lead time and cooperates between processes by applying Lagrangian decomposition coordination method. Additionally we designed the method which can adjust inter-process lead time automatically in order to respond to the changing demand of each item. Then we examine the effectiveness of this method by numerical experiments.%昨今の不安定な経済状況の中，製造各社は市場動向によって大きく変動する需要に柔軟に対応可能な生産体制を確立することが必要となっている．しかしこのような生産環境において，素材納入から加工，組立，出荷までの各部門の生産スケジュールを全体的に最適化するのは非常に困難であり，多くの場合，各部門は部門ごとに与えられた納期の中で最適化をしようと努力し，やむを得ず納期遅れが発生しそうな場合には前後工程の生産管理者とのすりあわせによって調整しているのが現状である．