| Summary: | 博士 === 中原大學 === 工業與系統工程研究所 === 104 === Printed circuit board (PCB) manufacturing can be divided into three distinct phases: (1) the inner-layer circuit production, (2) the outer-layer circuit production, and (3) the post-production. This research considers a three-layer supply chain inventory model and calculates the minimal joint supply chain inventory cost. For the PCB industry, the characteristics of the 3C industry are short life cycle times, leading to steady price reductions every season. As a result, a PCB inventory model, which contains both cost of buyers and sellers, must consider the impacts of product quality, uncertainties in lead time, crashing cost, and time value in order to calculate the minimal PCB joint inventory cost. However, previous literature papers did not consider this kind of the joint inventory model for the PCB industry. Therefore, this research considers a three-layer joint inventory problem and uses a mathematical programming model to determine the best inventory model for the entire supply chain. For the mathematical model of the PCB industry, this study must consider quality, lead time, time value (present value), and customer-oriention of PCB products in order to calculate the minimal joint inventory cost. This study first constructs a two-layer (one-supplier and one-consumer) inventory model to obtain the minimal joint inventory cost. Then, this research extends the proposed model to a multi-supplier and umlti-consumer model and calculates the minimal joint inventory cost. Since the PCB industry can be viewed as a three-layer inventory model, this study furterher extends the proposed model to a three-layer PCB inventory model and calculates the minimal joint inventory cost. The results of this study can provide a way for the PCB industry to facilitate supplier evaluation and to fulfill the overall management of product quality, lead time, and cost in order to determine the optimal batch size and achieve the minimal inventory cost.
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