| Summary: | 碩士 === 淡江大學 === 管理科學學系碩士班 === 100 === Nowadays, in a competitive market, inventory management is an important issue for companies. In this study, we develop two economic order quantity models with defective items, and assume that the inspection results to contain TypeⅠand TypeⅡerrors. There are four chapters in this thesis. Chapter one introduces the motivation, purpose, literature review and framework of this study. The second chapter focuses on the manufacturer’s two-part trade credit strategy. That is, the retailer receives cash discount if he/she pays in the first period of time；Otherwise, the full deferrable payment in the second period of time. In third chapter, we consider that the credit trade linked to order quantity. That is, the manufacturer will provide a permissible delay of payments to the retailer if retailer’s order quantity is greater than or equal to order quantity required; Otherwise, the retailer have to pay the manufacturer immediately once he/she receives the items. We further provide algorithms to obtain the optimal solutions and the numerical examples to illustrate the solution procedure. The numerical examples results indicate that the quality of items and inspection affects retailer’s annual total profit. The retailer should improve inspection quality to reduce inspection error in order to increase annual total profit. Finally, this study proposes the findings and future research suggestions.
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