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  • 學位論文

整合製造商與顧客之含當機、重工和(n+1)次配送與兩階段式多樣產品延遲產品區隔生產方案之最佳生產週期與配送策略

Optimal Run Time and Delivery Policy for Vendor-Buyer Integrated EPQ Model with Breakdown, (n+1) Shipping Plan, Rework and Multi-Item Two-Stage Production Systems with Delayed Product Differentiation

指導教授 : 邱元錫
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摘要


本研究探討整合製造商與顧客含當機、重工和採用(n+1)次配送策略與兩階段式多樣產品延遲產品區隔生產方案之生產系統的最佳生產週期與配送策略。假設上述兩種模式為不完美的生產過程,且將不良品當中無法進行重工修復的進行報廢,後續將可重工的不良品進行修復,修復過程中仍會有不良品,將重工失敗品列為報廢品。為了更符合實際情況,本研究將第一種情況之配送策略改為(n+1)次定量配送且與傳統EPQ模型假設的連續配送比較,針對此兩種模式問題建立數學模式並尋找最佳解。本研究針對兩種假設情況建立數學模式:(1) 生產過程中,生產設備可能在任一生產階段發生隨機性當機情況,當發生當機情形時,則採AR(abort/resume)策略作為機器維修後的處理方式,即當設備維修完成後繼續生產未完成的批量;利用積分的方式與相關數值方法整合此模式之問題並求得最佳生產週期。 (2)在不同生產方案下,含有共同半成品之兩階段式多樣產品延遲產品區隔之生產-多次配送系統最佳化問題,利用Hessian Matrix與相關數學方法求得最佳生產週期與配送策略。最後,針對此兩種數學模式提出數值實例來加以驗證,並且針對參數值做敏感度分析,以提供業界作為決策之參考。

並列摘要


This thesis studies the optimal run time for a vendor-buyer integrated EPQ model with breakdown, (n+1) shipping plan, and the optimal production-shipment policy for a multi-item two-stage production system with delayed product differentiation. We assumed both inventory models the production process are not perfect, i.e. with defective items. All defective items produced will be reworked and there is failures in rework. Two mathematical models are developed, respectively: (1) in Part 1 of this thesis, a production system with stochastic machines breakdown, under AR (abort / resume) policy is examined. When the machine breakdowns it is under repair immediately and after repair it continues to complete the production of unfinished lot. The product distribution adopts (n+1) deliveries policy. (2) in Part 2 of this thesis, production-shipment decisions under different production schemes for a multi-item two-stage imperfect production system with delayed product differentiation are studied. The main goal focuses on determining the common cycle and delivery policy. Numerical examples with sensitivity analyses and comparisons are provided to demonstrate the practical usages and contribution of our obtained results.

參考文獻


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