Question 4 A Company Manufacturing Engine Components For Gm Is Looking At Implementing Spc Into Their Manufacturing Proc 1 (39.88 KiB) Viewed 22 times
Question 4 A company manufacturing engine components for GM is looking at implementing SPC into their manufacturing processes. They decide to start by measuring a manufacturing operation which drills and reams the pilot hole found in a V6 crankshafts. The dimension for the diameter of the hole has a specification of 23 +/- .080 mm. This characteristics interfaces with the transmission of the car and is therefore defined as a critical dimension. This process is also being done on a current piece of equipment. The manufacturer would like to apply SPC to the operation and prove the process is statistically capable. As a result, 50 samples were taken and the diameter (mm) was measured with the results found below: 2
23.006 23.021 23.035 23.045 23.030 23.000 23.005 23.010 22.995 23.040 22.950 22.990 23.040 23.004 23.010 22.965 22.995 23.035 23.040 23.025 23.050 23.025 22.996 23.025 23.035 23.014 22.980 22.970 23.020 22.955 23.030 22.990 22.980 23.000 22.940 23.025 23.025 22.980 22.950 23.020 23.005 23.000 23.033 22.985 23.010 23.044 23.045 23.005 22.950 22.980 Answer the following: 1. Calculate both the Cp and Cpk ratios. Is the process capable? 2. What is the expected yield and reject percentage? 3. What is the expected rejects per million?
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