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研究生:陳幸宜
研究生(外文):Chen, Hsing Yi
論文名稱:有限產能情況下多供應商多產品之存貨訂購策略
論文名稱(外文):Acquisition Policies for Multi-supplier Multi-item System with Finite Capacity
指導教授:溫于平溫于平引用關係
指導教授(外文):Wen. Ue Pyng
學位類別:碩士
校院名稱:國立清華大學
系所名稱:工業工程與工程管理學系
學門:工程學門
學類:工業工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:53
中文關鍵詞:多產品選擇供應商允許缺貨價格折扣有限產能
外文關鍵詞:multi-itemsuppliers selectionshortagediscountinglimited production
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企業的存貨控制與採購策略同等重要,最佳的經濟採購量能符合存貨管理制度,也有利於訂購產品時所負擔的成本。為了慎選合作的供應商和訂購適當的產品數,本研究整合此兩項重要議題,藉由數學規劃的方法來建立多產品、多供應商的存貨模式,同時考慮允許缺貨、價格折扣、供應商產能限制以及企業存貨資本限制的因素對模式的影響,並且將模式分別以獨立訂購週期法與固定訂購週期法來求解。除此之外,本研究更進一步考量在不允許缺貨的情形下,針對不同供應商於提供不同的價格折扣率予購買者時所造成對採購決策的影響。
透過編撰程式語言,由實驗內部輸出資訊顯示,加入缺貨成本後,選擇供應產品價格最低廉與適當數量的供應商群將更具彈性,能夠使得存貨系統的最終總成本為最低。且在所有實驗中,固定訂購週期法的總成本仍然比獨立訂購週期法的總成本為低。而在不允許缺貨的情境下,不同供應商群提供不同的折扣率的實驗部分,當供應商增多時,就能明顯的受到不同折扣率影響,採購管理人亦須注意不同折扣率對企業採購成本負擔之利弊。

The inventory control and the purchasing strategy of the enterprise are equally significant in the competitive marketplace. The optimal economic ordering quantities not only conform to the system of inventory management but also aid cost reduction while placing an order for items. In order to choose cooperated suppliers and buy appropriate amounts of goods, this thesis combines these two issues to construct the multi-item multi-supplier inventory models by the approach of mathematic programming simultaneously considering shortages, price discounting, production limits of suppliers and financial restrictions of ventures. Accordingly we solve the problems via the independent cycle approach and the fixed cycle approach respectively. In addition, the impact of variable discount rates provided by different suppliers with no shortages allowed is presented in this thesis as well.
By way of coding computer programs, from the output data of experiments with shortages we show that choosing those suppliers that offer cheapest prices and optimal production quantities can eventually result in the lowest inventory system cost. In most of the cases, the computational outcomes show that the fixed cycle approach is more cost-effective. Therefore, using the fixed cycle approach to settle procurement problems in shortage allowed is suggested. On the other hand, in no shortage allowed the effect of suppliers providing varied price discounting is obviously greater when there are more vendors. Consequently, decision managers should think it over that whether various price discounting would bring benefits to the company or not.

第一章 緒論 1
1.1 前言 1
1.2 研究動機與目的 3
1.3 研究範圍與限制 4
1.4 研究方法與架構 4
第二章 文獻回顧 7
2.1 存貨管理基本探討 7
2.2 缺貨成本之相關文獻 9
2.3 數量折扣之相關文獻 11
2.4 多個供應商之相關文獻 13
2.5 資源限制之相關文獻 14
第三章 模式建立 16
3.1 模式假設 16
3.2 符號說明 17
3.3 獨立訂購週期法 18
3.4 固定訂購週期法 23
3.5 不允許缺貨的採購模式 27
3.5.1 獨立訂購週期法 27
3.5.2 固定訂購週期法 31
第四章 實驗設計與分析 34
4.1 實驗設計 34
4.2 結果分析 36
4.2.1 實驗一結果分析 36
4.2.2 實驗二結果分析 38
4.2.3 實驗三結果分析 45
第五章 結論與建議 49
5.1 結論 49
5.2 未來研究方向建議 50
參考文獻 51

[1] 張淑清,「前置時間可變動下近似全域最佳化存貨模型之研究」,國立彰化師範大學商業教育研究所,碩士論文(2000)。
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