TFT-LCD Array Mask Decision Model
|關鍵字:||TFT-LCD製造廠;光罩;需求不確定;產能規劃;線性規劃;TFT-LCD;Mask;Uncertain Demand;Capacity Planning;Linear programming|
The production environment in a traditional 4.5” TFT-LCD factory has changed dramatically over the last five years. Due to new generation factories arising, the traditional 4.5” TFT-LCD factories are forced to accept orders to produce various small size display products instead of make-to-stock products. A large number of products are produced concurrently in a production line. In general, the photo machine is the bottle-neck machine in TFT-LCD array manufacturing process. There are variety types of photo machines existed in a production line. Mask is the main fixture of photo machine. The price of mask is very expensive. There are five photo operations in each product routing. Each operation for each product needs a mask as fixture of the photo machine. The type of mask must match with the type of photo machine. A large numbers of mask types and numbers must be decided. The performance of this decision is the outputs. In this study, we deal with the uncertain demand problem that the uncertain demand is represented by the probability distribution of product mixed. A linear programming model is formulated to decide the type and number of mask for each product to maximize the profit under the constraints of machine capacity. A real case is given to illustrate the decision model. And we also do sensitivity analysis.
|Appears in Collections:||Thesis|