考慮生產線空間限制及降低設置成本之整合性存貨模式研究

A Study of Integrated Inventory Model of Production Space Limit And Reduced Setup Cost

近年來，在國際競爭愈來愈嚴苛的條件下，各家企業必須採取理想對策滿足顧客需求，當顧客需求為多樣化時，及時化(Just In Time，JIT)系統為企業排除各種不必要浪費的技術，其主要方法是使每道生產作業所產生的物料在需要時能及時送達生產線，進而降低存貨水準，達到降低成本、零庫存、提高生產力的目標，因此及時化系統的理念乃是全球企業的主要核心。本研究主要建構在及時化系統的採購方法下，考慮單一買、賣方及單一產品的整合性存貨模式，探討考慮生產線空間限制情況下加入投資資金降低設置成本所帶來的影響，建構以訂購數量、運送次數與設置成本為決策變數之整合性存貨模式，並透過等批量運送方式下將產品送至買方尋求最適的訂購數量、運送次數與設置成本，最後針對模式建立演算法，並利用數值範例加以驗證與說明，比較有無生產線空間的差異，找出最佳存貨決策。

In recent years, due to the increasing of competition in the global business arena, companies need undertake different strategies to satisfy the need of their customers. When the customer’s needs start to diversify, companies began to utilize Just In Time inventory control system (JIT).Just in time system helps to reduce inventory level by ordering parts and manufacturing parts when needed. In result, company can reduce cost and achieve zero inventory, and thus, increase productivity. Therefore, Just in time system has become the core of global businesses. This paper is based on the procurement method of Just in time. This method uses the integrated inventory model when considering single buyer and seller’s limited production in space, and the effects in investing more money to reduce setup cost. Integrated inventory model uses purchase amount, delivery and setup cost to determine the optimum inventory methods. When using same lot size types of delivery system, company can determine the best solution to increase order quantity and reduces the setup cost. Finally, based on each scenario, company would cross-reference the accumulated data and find the best decision for their inventory system.