可修復耗損性產品存貨模式之最佳解

The Optimal Solution of Repairable Product Inventory Model

林雅琪(Ya-Chi Lin)

指導教授 ： 林賜德

中原大學/理學院/應用數學研究所/碩士(2011年)

https://doi.org/10.6840/CYCU.2011.00247

摘要

中文摘要
傳統的經濟生產批量（EPQ）模型及經濟訂購量（EOQ）存貨模型於早先時期已被推導演算出來，而且至今仍被許多企業管理者所廣泛應用。後來陸陸續續有許多文獻以此模型為架構，結合實際情形修改部分假設而演進出最佳的訂購存貨策略。其目的是利用計算訂購成本及存貨持有成本以求出最佳訂購量，使得生產作業每單位時間的總相關成本最低。惟，對於企業的管理者來說，仍然有許多因素必須考慮納入；傳統的EPQ模型假設生產所需的原物料能及時補充，而且相關費用僅包含生產作業成本、製成品的存貨持有成本以及購買原物料的成本等。但是現今的製造業一般均在生產週期開始就將生產製程所需的原物料一次購入，因此原物料的存貨持有成本也應該計入總相關成本之中；此外，實務上，原物料的儲存置放的過程中，常常因為其他原因導致耗損發生，相同的情形也發生在製成品存貨上；本文考慮於製程期間所產生之劣品，為可以修復的，修復後仍然能出售。因此，我們將原物料的存貨成本、原物料存貨耗損、製成品存貨耗損以及修復不良品之成本納入經濟生產批量（EPQ）模型中，並求得每單位週期時間之總相關成本之最佳生產週期時間解。
關鍵字：存貨、原物料存貨成本、原物料存貨耗損、製成品存貨耗損、修復不良品之成本、最佳解。

關鍵字

存貨

並列摘要

Abstract
Economic Production Quantity model (EPQ) and Economic Ordering Quantity model (EOQ) were calculated in the earlier stage and numerous organizational managers have been practiced with these models since then.
Later on, a large number of documents were applied with these models which combined actual situations and partial assumptions to develop the ideal purchasing inventory strategies. The purpose is applying purchasing cost calculation and inventory cost in order to minimize the total production cost in each unit of time.
Nevertheless, there are several factors that are necessary to consider for organizational managers. Traditional EPQ model assumes that materials are enough for production and related charges merely includes the production cost, inventory cost and material cost.
However, the manufacturers nowadays normally purchase all materials that require during the production at the beginning of manufacturing cycle. Therefore, original material cost of inventory is calculated in the total cost. In addition, raw material consumes often happens during storage of materials and similar situation happens to finished products. This essay assumes that defective products can be repaired and sold.
Therefore, we calculate the cost that includes: original material cost of inventory, original material goods in stock consume, finished products in stock consume, and repair cost of defective finished products into EPQ model and obtain the lowest total cost on each unit of time with the optimal solutions in production cycle.
Key words: Inventory、original material cost of inventory、original material goods in stock consume、finished products in stock consume、 repair cost of defective finished products、
The Optimal Solutions.

並列關鍵字

Inventory

參考文獻

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