近十年來,隨著環保意識的持續高漲,各國也極力制定各項環境保護的法規以保護地球上有限的資源,節省有限資源的快速利用,及降低廢棄物之產生。對於企業而言,主要目標是降低成本、提高產品的整體價值並提供顧客最好的服務,以增加企業之核心競爭力。但在提高企業競爭力的同時,應該考量環境成本對本身所帶來的影響,因此,如何利用資源回收與再生來降低相關的物料成本,是企業在提高市場競爭力上另一項考量的重點。除此之外,藉由供應鏈管理,建立密切的夥伴關係,以降低成本、快速回應顧客需求,進而提升經營績效,已經成為企業最關注的議題。 本研究以可回收性產品為研究對象來建立模式,在單一產品與單一週期情況下,分別考量允許補貨之可回收性產品整合二階存貨模式與可回收性產品整合三階之存貨模式作深入性之分析與探討。其整合性存貨模式訂購方式採用單次訂購多批量運送之方式。本研究建立數學模式並利用數學套裝軟體Maple 8來求解最佳之訂購量與最低之總成本,最後並透過數值範例與敏感度分析來暸解影響系統之關鍵參數。
In recent decades, there is an increasing environmental consciousness. In order to protect environment and reduce the use of our limited resources, most countries have set up various environmental protection laws. Effective cost reduction, enhancing product value, offering good service is the best way to increase enterprise’s competitiveness. However environmental protection cost is also an important factor; resource recovery and regeneration to reduce the relevant materials cost effectively is a very important approach to raise enterprise’s competitiveness. In addition, a close partnership in supply chain management could promote cost reduction and quick response. This study analyzes the inventory model of recoverable items with integrated two-echelon with backordering and integrated three-echelon multiple lot-size deliveries. A mathematical model is developed, and mathematic software Maple 8 is used to derive the optimal order quantity with minimal total cost. Numerical examples and sensitivity analysis are carried out to analyze the influence of key parameters in the inventory system.