# hw6 - Homework 6 Quality control 8.18(a(b This confidence...

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Richard Mouawad IE 530 Homework 6 Quality control 8.1 8.9 Process A Process B Prefer to use Process B. 8.10 Process A: Process B: Process B will result in fewer defective assemblies. Since more parts from Process B will be within specification than from Process A. 8.15 Response Time, minutes Percent 130 120 110 100 90 80 70 99 95 90 80 70 60 50 40 30 20 10 5 1 98.78 50 110.98 84 Mean 0.243 98.78 StDev 12.27 N 40 AD 0.463 P-Value Probability Plot of Response Time (Ex7-15Resp) Normal  The distribution is close to normal.

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Richard Mouawad IE 530 Homework 6 Quality control (a) (b) USL = 120 mins 8.17 Ex7-17FT Percent 3000 2500 2000 1500 1000 99 95 90 80 70 60 50 40 30 20 10 5 1 Mean 0.587 1919 StDev 507.1 N 10 AD 0.272 P-Value Probability Plot of Failure Times (Ex7-17FT) Normal  The data is not normally distributed; so it is not appropriate to estimate capability.

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Unformatted text preview: Homework 6 Quality control 8.18 (a) (b) This confidence interval is wide enough that the process may either be capable or far from it. 8.21 (a) (b) 8-23 8.27 (a) Gauge capability: (b) Sample Sample Mean 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 25.0 22.5 20.0 17.5 15.0 _ _ X= 20.7 UCL= 23.58 LCL= 17.82 Sample Sample Range 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 6.0 4.5 3.0 1.5 0.0 _ R= 1.533 UCL= 5.010 LCL= 0 1 1 1 1 1 1 Xbar-R Chart of Part Measurements (Ex7-27All) Test Results for R Chart Richard Mouawad IE 530 Homework 6 Quality control TEST 1. One point more than 3.00 standard deviations from center line. Test Failed at points: 11, 12 Out-of-control points on R chart indicate operator difficulty with using gage....
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hw6 - Homework 6 Quality control 8.18(a(b This confidence...

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