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研究生:周清雅
研究生(外文):Ching-Ya Chou
論文名稱:有限產能下多產品多供應商系統之採購決策
論文名稱(外文):Purchasing Decisions for Multi-item Multi-supplier Systems with Finite Capacity
指導教授:溫于平溫于平引用關係
指導教授(外文):Up-Pyng Wen
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:2005
畢業學年度:93
語文別:英文
論文頁數:52
中文關鍵詞:經濟訂購批量多供應商多產品價格折扣有限產能
外文關鍵詞:EOQmulti-suppliermulti-itemprice discountfinite capacity
相關次數:
  • 被引用被引用:3
  • 點閱點閱:321
  • 評分評分:
  • 下載下載:97
  • 收藏至我的研究室書目清單書目收藏:2
採購是供應鏈中最重要的面向之一。 在大多數的採購文獻中,可分為供應商選擇與訂購數量。選擇一個好的供應商不僅可以降低採購成本,還能確保商品的品質;訂購適當的量就相當於在恰當的價格下擁有較低的存貨與訂購成本。然而,現今的供應商因為產能限制往往無法滿足所有的訂單,致使購買者必須在不同的價格下向多個供應商訂購。
  本論文以經濟訂購批量(economic ordering quantity)的傳統模型為基礎,將多產品、多供應商、有限產能與價格折扣列入考慮,提出一個供應商選擇與訂購數量的整合模式。此外,我們還提出兩階段法(the two-stage method)來求解,並與套裝軟體LINGO作比較,結果顯示兩階段法為容易找到近最佳解的方法。最後,我們利用兩階段法分別測試固定週期訂購法 (the fixed cycle approach)與獨立週期訂購法(the independent cycle approach)在該模式下的不同應用。我們發現在大多數的情況下,使用固定週期法較獨立週期法更為節省成本,特別是在高價格折扣率(price discount rate)與高限制緊度(constraint tightness)的情形下。
One of the most important aspects in supply chain is how to purchase. In most purchasing literature, the problem of purchasing can be divided into two parts: the selection of suppliers and the quantity of ordering. Choosing a good supplier can not only reduce the purchasing cost but also guarantee the quality. Ordering a right quantity is equal to have lower inventory and ordering costs under the right price. However, today suppliers can not often satisfy all demands of a purchaser because of finite capacity so that the purchaser must order from multiple suppliers in different price.
In this thesis, we use the traditional model of economic ordering quantity as the foundation and consider the multi-item, multi-supplier, finite capacity and price discount to propose a unified model for both of the supplier selection and the ordering quantity. In addition, the two-stage method is presented and compared with the software package, LINGO, to show that it is easy to find a near-optimal solution. Finally, we apply the two-stage method to test the fixed cycle approach and the independent cycle in the proposed model respectively. According to the computational results, the fixed cycle approach is more cost-effective than the independent cycle approach, especially in high price discount rate and high constraint tightness.
TABLE OF CONTENT
中文摘要 i
ABSTRACT ii
ACKNOWLEDGEMENT iii
TABLE OF CONTENT iv
LIST OF FIGURES vi
LIST OF TABLES… vii

CHAPTER 1 INTRODUCTION 1
1.1 Preface 1
1.2 Motivation 2
1.3 The Scope of the Research 3
1.4 The Framework of this Thesis 4
CHAPTER 2 LITERATURE REVIEW 5
2.1 The Profile of the Purchasing 5
2.2 The Relaxations of Economic Order Quantity Model 6
2.2.1 Price Discount 6
2.2.2 Multiple Items and Constraint 7
2.2.3 Multiple Suppliers and Constraint 8
2.2.4 All-unit discount, Multiple Items and Constraints 9
2.2.5 All-unit discount, Multiple Items, Multiple Suppliers and Constraints 10
CHAPTER 3 MODEL FORMULATION 11
3.1 Problem Statement 11
3.2 Model Assumptions 11
3.3 Notations 13
3.4 The Basic Model 14
3.4.1 Fixed Cycle Approach 14
3.4.2 Independent Cycle Approach 16
3.5 Two-stage Method 17
3.5.1 Fixed Cycle Approach 20
3.5.2 Independent Cycle Approach 25
CHAPTER 4 EXPERIMENTAL DESIGN AND RESULT 31
4.1 The Data of Experiments 31
4.2 Experimental Preliminary and Design 32
4.2.1 Experimental Preliminary 32
4.2.2 The Comparative Standard of the Two-stage Method and LINGO 34
4.2.3 Experimental Design 34
4.3 Experiment Result and Discussion 35
4.3.1 FCA by Using the Two-stage method and LINGO 35
4.3.2 ICA by Using the Two-stage method and LINGO 39
4.3.3 FCA and ICA by Using the Two-stage method 44
CHAPTER 5 CONCLUSION 49
Reference 51
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