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研究生:吳修政
研究生(外文):Hsiu-cheng Wu
論文名稱:考慮延遲付款之新品最佳訂購批量與回收處理數量問題
論文名稱(外文):The optimal order quantity of new products with delay in payment and processing quantity of recycled products
指導教授:張秀雲張秀雲引用關係
指導教授(外文):Shiow-yun Chang
學位類別:碩士
校院名稱:國立成功大學
系所名稱:工業與資訊管理學系碩博士班
學門:商業及管理學門
學類:其他商業及管理學類
論文種類:學術論文
論文出版年:2008
畢業學年度:96
語文別:中文
論文頁數:49
中文關鍵詞:回收再利用延遲付款信用交易
外文關鍵詞:RecycleReuseCredit periodDelay in payment
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有鑑於全球資源逐漸缺乏,世界各國開始制訂環保相關法規,來規範產品的購買與製造。世界各大企業亦為了配合各國政府所訂定的相關法規,在採購產品以及製造產品時,都會符合所謂的綠色採購原則。在這種情況下,雖然企業可以使用回收品再利用,可是考慮到回收品無法完全回收,可再利用率或是可拆解率等,而造成回收品不足以滿足顧客需求。此時,就需搭配購買新品來滿足需求,以確保顧客滿意。
另一方面,現在有許多企業為了要提高市場佔有率、刺激市場的需求或是降低本身庫存的壓力,而考慮給予買方延遲付款的優惠以增加訂購量。這種優惠不但讓買方可以減少因購買貨品而造成存貨資金積壓的壓力,更可以因為提早在付款期限內出清,而賺取機會成本。但是買方如果沒辦法在信用交易期間賣完的話,又會產生額外的資金積壓所衍生的利息,這將造成無形的負擔。
本研究將對於回收品處理數量與另購新品之間的最佳經濟訂購批量進行探討。回收品會考慮到回收率且採立即付款方式,而新品則是在具有延遲付款機制下進行採購。在整合兩者模式後,求出回收品處理批量及新品的訂購批量,使得模式更接近現今市場交易方式。
藉由模式的探討以及敏感度分析,本研究得到因為參數與機會成本對訂購批量以及回收開始再處理的數量的影響情形。另外,由於環保議題的關係,現在有許多企業開始同時考慮新品與回收品,因此可以建議決策者在進行採購時,可以將機會成本對於新品與回收品之影響納入考量,並可以更謹慎考慮兩者之關係,而使得更能應用於現實情況。
Because the resources decrease ceaselessly, countries have started to regulate product’s purchasing and manufacturing to compensate environmental protection. Upon these regulations, enterprises have begun recycling products. Since recycling is unable to reuse the original material completely, recycled products cannot meet the customer’s demand solely. They must purchase new products to fulfill their need.
However, many enterprises want to increase the market share or lower stock level. They provide delay in payment to the customers to increase the order quantity. If buyers can sell all goods in a certain time period, they can accumulate revenue and earn interest. Otherwise, they will be charged higher interest.
This thesis discusses the optimal order quantity of new products and the processing quantity of recycled products. For the recycled products, the return rate is considered and payment is paid off immediately. The payment of purchasing new products can be offered a credit period. Finally, we confirm the order quantity of new products and the processing quantity of recycled products into a mathematical model.
Based on our models and through sensitivity analysis, this research finds the relationship between the order quantity of new products and processing quantity of recycled products according to the change of parameters. In addition, for enterprises which purchase new and recycled products simultaneously, we also provide managers the relationship of opportunity cost on the new and recycled products in the realistic situation.
第一章 緒論 1
1.1 研究背景與動機 1
1.2 研究目的 2
1.3 研究流程與架構 3
第二章 文獻探討 4
2.1 傳統存貨模式 4
2.2 逆物流 5
2.2.1 逆物流活動 6
2.2.2 回收性商品存貨 11
2.3 延遲付款 12
第三章 模式建構 15
3.1 基本假設與符號定義 15
3.1.1 基本假設 15
3.1.2 符號定義 16
3.2成本模式 18
3.2.1 新品相關成本 19
3.2.2 回收品 20
3.2.3 機會成本 21
3.3 總成本模式 21
3.3.1當回收品再生速率大於需求率 22
3.3.2 當回收品再生速率小於需求率 25
第四章 數值驗證與分析 31
4.1 數值範例 31
4.1.1 相關參數設定 31
4.1.2 範例說明 32
4.2 敏感度分析 33
4.2.1新品單位價格對新品訂購批量及回收品開始處理數量之影響 34
4.2.2回收價格對新品訂購批量及回收品開始處理數量之影響 34
4.2.3訂購成本對新品訂購批量及回收品開始處理數量之影響 35
4.2.4設置成本對新品訂購批量及回收品開始處理數量之影響 36
4.2.5需求率對新品訂購批量及回收品開始處理數量之影響 37
4.2.6回收率對新品訂購批量及回收品開始處理數量之影響 38
4.2.7新品存貨成本對新品訂購批量及回收品開始處理數量之影響 39
4.2.8回收品存貨成本對新品訂購批量及回收品開始處理數量之影響 40
4.2.9每年資金賺取利率對新品訂購批量及回收品開始處理數量之影響 41
4.2.10存貨資金積壓利率對新品訂購批量及回收品開始處理數量之影響 42
4.2.11 敏感度分析小結 43
第五章 44
5.1 結論 44
5.2 未來發展與建議 45
參考文獻 47
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