| With the rapid development of economy, the credit period has always offered to his/her customers by the retailer, and in which the customers needn't pay any money to their retailer, and moreover, the income was stored in correlative account to obtain certain profit. Due to the credit payment can promote the effective allocation of social resources and propel the rapid development of economy, and thus inventory control principle have attracted widespread attention gradually, so then, intensive researches have been proposed in them by more and more scholars and experts, in the meantime, have produced the enormous economic benefit to country and enterprise. But. because of the great challenge of computer and information technology, the inventory control principle needs to the further improvement. Based on the existing researches of domestic and abroad, the main researches in the thesis are summarized as follows:1. The effects of defective rate on conventional economic order quantity (EOQ) model have analyzed with credit payment. By assuming that the credit payment of the retailer offer to his/her customers is an order period and defective rate obey a certain distribution, but in the model the storage is not allowed. Then objective function with the maximum profit was developed, and the effects of strategic variable on objective function were analyzed.2. The economic quantity model with defective products was developed. By assuming that the credit payment of the retailer offer to his/her customers is an order period and defective rate obey a certain distribution, and the following two conditions of supply of material was analyzed with the shortage is allowed:(1) the shortage is provided timely.(2) the shortage completely backordered. Furthermore, the optimal solution of the model was analyzed minutely. At last, numerical example is presented and the effects of strategic variable on optimal solution and optimal annual profit were also given to illustrate the proposed model. |
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