Question: Quality Control Homework 1. Anka, Inc, makes drill bits for use in the heavy machinery industry. Their most popular model is 2 inches in diameter.

Quality Control Homework 1. Anka, Inc, makes drill bits for use in the heavy machinery industry. Their most popular model is 2 inches in diameter. Every hour Jon, who operates the machine which forms the bits, takes 5 bits and measures their diameter. The results for the first few hours of the day are below. Prepare control charts for this process. Is the process in control? (Assume a 99.7% confidence level) Hour/Bolts 8 am. 9 am. 10 a.m. 11 a.m. Noon 1 1.98 1.97 2.02 1.95 1.99 2 3 4 5 2.00 2.04 1.97 2.00 1.94 2.01 2.05 202 2.012.06 1.97 1.99 1.96 1.971.99 1.97 2.02 201 2.032.00 2. Part of the new quality control efforts at the Registrar's might be to examine grade reports to see if any errors are found. Dan has examined 10 grade reports so far and the number of errors he has found on each one is shown below. Using a 99.7% confidence level, prepare a control chart for the grade report process Is the system in control? Report Number of Errors 1 Report Number of Errors 3. IBM tests 150 computers every hour in their Charlotte manufacturing plant to see if they are defective or not. The computers are plugged in and, if they operate for 4 hours without crashing, they are considered OK to ship. The table below shows the number of computers which did not pass the test over the last 12 hours Prepare a control chart for this process with a 95.4% confidence level. Is the process in control? Hour Number Hour Numbe 2. Part of the new quality control efforts at the Registrar's might be to examine grade reports to see if any errors are found. Dan has examined 10 grade reports so far and the number of errors he has found on each one is shown below. Using a 99.7% confidence level, prepare a control chart for the grade report process. Is the system in control? Report Number of Errors Report Number of Errors 0 ale ONOO

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