|其他題名: ||A study on the integrated inventory models involving defective items under quantity discount|
|作者: ||洪英傑;Hung, Ying-chieh|
|關鍵詞: ||整合存貨模式;不良品;品質改善;數量折扣;integrated inventory model;defective items;quality improvement;quantity discount|
|上傳時間: ||2010-01-11 03:44:13 (UTC+8)|
The modern enterprise starts JIT production management system which successfully integrated both sides of business to promote competitiveness and profit by the concept of cooperation. The JIT production emphasized on the high quality, the low inventory, and reducing unnecessary waste. However, in the majority of related integrated inventory model literature, most of them didn’t consider the quality, and supposed the items which supplier provides for is perfect. But in realistic situation, the imperfect of supplier''s production processes and artificial negligence caused the retail to receive the items to include defective items which will affect retail''s inventory level and the frequency of orders. Moreover, if the retail has not passed through the inspection, and gave the defective items to consumer, it would cause the customer to complain and they would even request the price discount when return or backup items. It is really great to enterprise''s business. Therefore, defective items cannot be neglected to the enterprise manager. Furthermore, based on certain purpose or pursued maximum economic profit, the supplier often can give the different price discount to the retail. Therefore, the retail controls the order quantity plan which affect the items on hand and the order strategy. If the defective items production occur to incomplete production processes, then the management stratum will be able to consider improve the production quality by investment capital. Namely to increase few production cost will reduce the processing expense which will produce defective items increases.
This paper extends the integrated inventory model of Huang(2002) by considering the supplier provides the quantity discount and adopts differently ships
strategy. In chapter 2, we considered an arrival order lot often contains defective items and the retail inspects all the items. We establish the integrated inventory model involving quantity discount under the number of defective items in an arrival lot is constant and random variable. In chapter 3, we considered the integrated inventory model for investment capital in process quality improvement under quantity discount. The goal of three models takes the unit time joint expectation total cost has the minimum value. We use tradition optimum principle and the development of algorithm and find optimal solution.