Sampling Hour	Shift	Sample 1	Sample 2	Sample 3	Sample 4
6:00 AM	1	10.94	10.74	11.06	10.66
7:00 AM	1	10.66	10.6	10.8	10.68
8:00 AM	1	10.68	10.6	10.54	10.36
9:00 AM	1	10.03	10.72	10.74	10.7
10:00 AM	1	10.7	10.62	11.04	10.58
11:00 AM	1	10.38	10.42	10.66	10.4
12:00 PM	1	10.46	10.6	10.26	10.02
1:00 PM	1	10.66	10.6	10.22	10.68
2:00 PM	2	10.5	10.78	10.68	10.58
3:00 PM	2	10.58	10.48	10.58	10.4
4:00 PM	2	10.8	10.74	10.36	10.6
5:00 PM	2	10.42	10.6	10.64	10.34
6:00 PM	2	10.52	10.6	10.46	10.6
7:00 PM	2	11.04	10.72	10.56	10.5
8:00 PM	2	10.52	10.62	10.68	10.7
9:00 PM	2	10.38	10.42	10.76	10.54
10:00 PM	3	10.56	10.6	10.28	10.68
11:00 PM	3	10.58	10.6	10.58	10.64
12:00 AM	3	10.42	10.78	10.64	10.86
1:00 AM	3	10.01	10.48	10.84	10.7
2:00 AM	3	10.84	10.64	10.4	10.52
3:00 AM	3	10.54	10.36	10.6	11.02
4:00 AM	3	10.68	10.4	10.56	10.32
5:00 AM	3	10.7	10.6	10.74	10.52

1- Which control chart is the most appropriate to evaluate this case? Explain your answer. 2- Construct the process control graph for the critical parameter. 3- Analyze the graph and interpret your results. Determine if the process is in control or not. Explain your answer. 4- Considering the product specifications, determine the process capacity (Cpk). 5- What conclusions can you reach? What would be your next steps?

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10.10 mm +/- 1mm (go from 10-11mm)

You will consider the process of a roll of plastic material sleeves for clinical use, manufactured through a process called extrusion. The process is continuous and produces a roll of 1000 linear foot plastic tube every 15 minutes. 96 rolls are made in a three-turn run. The manufacturing process for this product is new to the company and they have only produced it using the experience of operators and quality control personnel. The critical parameter for this product is the inner diameter (ID) of the tube (DP), whose specifications are: 10.10 mm + / 1mm. These diameters are measured through a sectional cut. Consider that you have been hired as a quality manager. You have been given the task of establishing a quality control, so you decide to implement control charts. Here is the Data