Question

1-The target value of a process is 100 + 2.5. Data collected indicates the current mean of the process is 98.2 with a standard deviation of 0.6. Determine the process capability for this process?

You have taken 7 samples with 6 observations each from a can operation and tested the cans for compression strength. Summary data is given below. You are to use the data for questions 2-3.

1 2 3 4 5 6 7 143.51 143.94 143.66 143.49 143.64 143.34 143.99 143.46 143.2 143.44 143.94 143.63 143.42 143.94 143.54 143.54 143.55 143.56 143.62 143.99 143.95 143.34 143.56 143.77 143.62 143.32 143.02 143.95 143.46 143.7 143.7 143.69 143.34 143.03 143.94 143.46 143.7 143.64 143.56 143.24 143.47 143.97 X-bar = 143.46 143.61 143.63 143.64 143.47 143.38 143.96 R = 0.20 0.74 0.33 0.45 0.40 0.97 0.05 S = 0.068 0.245 0.117 0.160 0.184 0.357 0.020

2- Construct an X-bar R chart. Is the process stable and in control?

3-Determine the upper and lower control limits for an X-bar S chart. You need not plot, just determine the control limits.

Answer 1

Page Classsmazt 102.5-92. 1.38 143. 53 n. -thau L4 32 C n RR 0.44 7 mts

Dele Page Classsmazi UcL 2 -net a . centrih Lc 143.99 チニ 14359