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Precision instruments company has been manufacturing electronic sensors for various applications for several decades. Its biggest-selling product is the temperature-encapsulated temperature sensors that produce an output proportional to the temperature by measuring the line of temperature-induced voltage across the junction between two different metals- think "thermocouple" and "couple" equals two metals) it has been producing on the same equipment for twenty years. The accuracy of each completed device is tested and the devices are then sorted by accuracy into tolerance ranges as shown below. The table also includes the sales price for devices in each range. The most accurate devices, naturally, fetch the highest price from customers, while less-accurate devices will fetch decreasing prices. Below a certain level of accuracy there will be no buyers, so the extras are typically donated to college engineering departments and trade schools. In addition, a certain percent of the produced items are typically scrapped entirely as the production process fails completely. This product line has been profitable for a long time, especially because the well-maintained production facility has not required significant capital investment since installation. The company now faces two challenges. The first is that, while the most accurate devices are continuing to sell well, the willingness of customers to accept less-accurate devices is decreasing. The second is that the company must determine whether a concerted effort to improve the operation of the existing production line will be sufficient to produce more devices with greater accuracy or whether an entirely new production line must be built. A six sigma exercise can be employed to improve accuracy. Which is the minimum production requirement to see if the quality of production of sensors can be improved at minimal cost (percentages in the exercise improvement in accuracy: 0-0.5%/0.5-1%/0-2%/0-5%/5-10%)? <此处为图片>(含图)
Precision instruments company has been manufacturing electronic sensors for various applications for several decades. Its biggest-selling product is the temperature-encapsulated temperature sensors that produce an output proportional to the temperature by measuring the line of temperature-induced voltage across the junction between two different metals - think "thermocouple" and "couple" equals two metals) it has been producing on the same equipment for twenty years. The accuracy of each completed device is tested and the devices are then sorted by accuracy into tolerance ranges as shown below. The table also includes the sales price for devices in each range. The most accurate devices, naturally, fetch the highest price from customers, while less-accurate devices will fetch decreasing prices. Below a certain level of accuracy there will be no buyers, so the extras are typically donated to college engineering departments and trade schools. In addition, a certain percent of the produced items are typically scrapped entirely as the production process fails completely. This product line has been profitable for a long time, especially because the well-maintained production facility has not required significant capital investment since installation. The company now faces two challenges. The first is that, while the most accurate devices are continuing to sell well, the willingness of customers to accept less-accurate devices is decreasing. The second is that the company must determine whether a concerted effort to improve the operation of the existing production line will be sufficient to produce more devices with greater accuracy or whether an entirely new production line must be built. (缺图)【缺少答案,请补充】