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Question 4 (28 Marks) As the Quality Control Facilitator because of the difficulty of assembling a pulley to a shaft using a key and keyway you have chosen the problem as the subject for a study. The characteristic chosen is the keyway depth of 6.35 mm. It is decided that 5 samples a day will be taken with the sample size of 4 measurements. The following data is 5 days of sampling Subgroup No Date Time Measurements 23/12 0850 1130 1345 1 2 3 4 5 6 6.35 6.46 6.34 6.69 6.38 6.42 6.44 New Temp 27/12 7 8 6.33 9 28/12 1545 1620 0835 0900 0940 1330 1450 0830 1335 1425 1435 1555 0825 0925 1100 1435 1515 0935 1020 1135 1400 1625 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 29/12 6.40 6.32 6.33 6.37 6.36 6.41 6.40 6.34 6.36 6.64 6.68 6.59 6.34 6.44 6.40 6.41 6.43 6.34 6.41 6.41 6.46 6.41 6.38 6.36 6.52 6.49 6.51 6.43 6.36 6.42 6.41 6.39 6.38 6.37 6.41 6.41 6.38 6.47 6.35 6.39 6.45 6.42 6.42 6.43 6.45 6.35 6.29 6.39 6.40 6.296.34 6.44 6.28 6.58 6.32 6.37 6.38 6.55 6.45 6.48 6.40 6.45 6.37 6.42 6.35 6.40 6.39 6.39 6.36 6.366.35 6.38 6.38 6.43 6.44 6.48 6.47 6.38 6.37 6.40 6.38 6.50 6.33 6.41 6.38 6.33 6.56 6.38 6.39 6.42 6.43 6.39 Damaged oil line Bad Material 30/12 SUNN 1) these charts ii) iii) Calculate and create the appropriate charts for this process and plot the relevant points on Is this manufacturing process under control? Comment on the reasons for your answer. Descnbe the various criteria that can be applied to control charts to determine whether a process should be investigated for special and/or common causes