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Problem 8-35
El Toro Grande Restaurante
This spreadsheet is designed for up to 50 samples, each of a constant sample size from 2 to 10. Enter data ONLY in yellow-shaded cells.
Enter the number of samples in cell E6 and the sample size in cell E7. Then enter your data in the grid below.
Click on sheet tabs for a display of the control charts (some rescaling may be needed). Specification limits may be entered in cells N7 and N8 for process capability.
Number of samples (<= 50) 40 Process Capability Calculations Six sigma 1.98 Std, dev. = 0.330
5Upper specification 3.00 1.52
Lower specification 0.00 1.50
Grand Average A3 B3 B4 d2 1.53
Avg. std. dev. 1.43 0 2.09 2.33 1.50
DATA 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00 16.00 17.00 18.00 19.00 20.00 21.00 22.00 23.00 24.00 25.00 26.00 27.00 28.00 29.00 30.00 31.00 32.00 33.00 34.00 35.00 36.00 37.00 38.00 39.00 40.00 41 42 43 44 45 46 47 48 49 50
7
8
9
10
Average 1.53 1.39 1.74 1.39 1.37 1.53 1.33 1.57 1.45 1.23 1.57 1.75 1.52 1.44 1.40 1.80 1.57 1.55 1.43 1.48 1.80 1.50 1.50 1.50 1.76 1.22 1.58 1.36 1.85 1.67 1.27 1.50 1.51 1.42 1.56 1.46 1.74 1.62 1.52 1.31 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A
LCLx-bar 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08
Center 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52
DO NOT MODIFY THIS TABLE
nA2 D3 D4 d2 A3 B3 B4
2 1.880 0.000 3.267 1.128 2.659 0.000 3.267
Control Chart Factors
X-bar and s-Chart
Sample size (2 - 10)
1.518
0.308
Cp
Cpu
Cpl
Cpk
1.10
1.90
2.10
Sample number
Prob. 8-35 X-bar Chart
Averages
Lower control limit
Upper control limit
Center line
0.50
0.60
0.70
Sample number
Prob. 8-35 s-Chart Standard Deviations
Lower control limit
Upper control limit
Center line
