A company making tires for bikes is concerned about the exact width of its cyclocross tires. The company has a lower specification limit of 22.8 mm and an upper specification limit of 23.2 mm. The standard deviation is 0.15 mm and the mean is 23 mm. Round your answer to 4 digits after the decimal point if it is not an integer. Do NOT use comma in your numeric answers. The process capability index for the process is . The probability of producing a tire being too wide is (use Excel to compute). The probability of producing a defective tire is (use Excel to compute). Suppose that the company now wants to reduce its defect probability to a target of PPM of 318.2172. It implies that the company should improve its process capability index to (use the table below), which in turn implies that the standard deviation has to be reduced to mm (use the table below) in order to meet the target. Table 9.1.jpg