spc simplified

20
Electric Motor Shaft Endplay (.001 inch) 32 Electric Motor Shaft Endplay (.001 i 26 SPC Simplified pg 16 42 53 36 Draw a Histogram With No Spec Limits 47 32 41 20 28 44 51 46 37 40 40 39 37 50 51 44 23 43 25 36 58 43 31 33 40 42 33 45 38 48 45 31 39 50 52 57 27 44 44 55 38 45 33 51 43

Upload: badalan-florentina

Post on 23-Oct-2014

42 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: SPC Simplified

Electric Motor Shaft Endplay (.001 inch)32 Electric Motor Shaft Endplay (.001 inch)26 SPC Simplified pg 16425336 Draw a Histogram With No Spec Limits473241202844514637404039375051442343253658433133404233453848453139505257274444553845335143

Page 2: SPC Simplified

Torque (ft/lbs) Hose Clamping Force Torque (ft/lbs) Hose assembly has a high rejection rate7 USL=24 17 Should action be taken?

10 LSL=12 19 If so what?14 19 Draw XmR Chart of process11 20 Draw Histogram of before and after process change data using USL and LSL13 2112 1713 1815 2012 1913 2014 1710 2011 2115 2013 19

9 1813 1814 1916 2017 1915 1919 1812 1916 1914 18

17 Process Change19 Air pressure change to stall out torque wrench at 18 ft/lbs.1920211718201920172021201918181920191918191918

Page 3: SPC Simplified

Draw Histogram of before and after process change data using USL and LSL

Page 4: SPC Simplified

Signal to Noise (db) in Radios21 20 30 27 26 LSL = 15 Draw XbarR chart of 5 sample data27 27 29 25 28 Sample size = 5 Draw Histogram with LSL of 5 Sample Data32 24 25 25 2829 28 28 25 2525 27 25 25 1824 26 25 26 2227 26 23 25 2727 30 24 31 2327 27 23 29 3027 24 26 22 2524 23 27 22 2523 25 26 26 2132 28 25 23 2530 23 25 26 2529 31 27 24 2224 26 27 28 2425 27 25 28 2526 29 20 21 2627 31 30 26 3631 26 25 22 2725 27 27 28 2626 24 28 24 2532 33 22 24 2828 23 26 28 28

Page 5: SPC Simplified

Draw XbarR chart of 5 sample dataDraw Histogram with LSL of 5 Sample Data

Page 6: SPC Simplified

Pin Diameters0.249 0.251 0.251 0.248 0.250 USL=0.258 Draw XbarR chart of sample data0.251 0.246 0.252 0.248 0.250 LSL=0.242 Draw Histogram with USL/LSL of 5 Sample Data0.250 0.250 0.246 0.250 0.2510.249 0.253 0.245 0.254 0.2490.250 0.246 0.251 0.249 0.2500.250 0.250 0.251 0.251 0.2510.247 0.251 0.253 0.250 0.2490.250 0.251 0.253 0.249 0.2480.246 0.250 0.248 0.250 0.2510.251 0.248 0.249 0.249 0.2500.251 0.249 0.249 0.251 0.2520.251 0.255 0.248 0.247 0.2490.250 0.252 0.252 0.249 0.2510.250 0.251 0.254 0.251 0.2510.252 0.251 0.248 0.252 0.2510.249 0.250 0.249 0.251 0.2520.250 0.249 0.250 0.250 0.2500.248 0.250 0.249 0.251 0.2510.251 0.248 0.250 0.250 0.2520.254 0.251 0.254 0.249 0.251

Page 7: SPC Simplified

Draw Histogram with USL/LSL of 5 Sample Data

Page 8: SPC Simplified

Defectives Sample Size Dirt and grease spots in shipped productMon 30 48Tue 27 48 Draw p Chart of DataWed 34 48Thu 23 48Fri 20 48Mon 33 48Tue 22 48Wed 24 48Thu 18 48Fri 34 48Mon 25 48Tue 20 48Wed 24 48Thu 23 48Fri 16 48Mon 19 48Tue 32 48Wed 26 48Thu 25 48Fri 25 48

Page 9: SPC Simplified

Sample Scratched Wrinkled Bent Cracked Total1 14 10 5 1 0 30 100 Draw a u Chart of Total Defects over Sample Size2 16 7 5 0 1 29 100 Draw a Pareto Chart of Types of Defects3 13 10 2 2 0 27 1004 12 6 5 1 0 24 1005 12 10 9 5 0 36 1006 11 6 4 0 2 23 1007 17 6 3 0 0 26 1008 20 12 1 1 0 34 1009 11 6 5 1 1 24 100

10 9 10 7 0 0 26 10011 6 7 7 2 0 22 10012 8 9 8 3 0 28 10013 21 9 3 3 0 36 10014 17 7 3 3 0 30 10015 15 11 2 3 0 31 10016 10 10 4 2 0 26 10017 9 9 3 3 0 24 10018 17 5 2 3 1 28 10019 12 11 2 1 0 26 10020 14 7 5 4 0 30 100

Total 264 168 85 38 5

Wrong Part

Sample Size

Page 10: SPC Simplified

Draw a u Chart of Total Defects over Sample SizeDraw a Pareto Chart of Types of Defects

Page 11: SPC Simplified

Inspection Report of auto seat cushions DateKind of Defect 12-Aug 13-Aug 14-Aug 15-Aug 16-Aug Total Defect 12-AugPoor Mix 2 3 1 6 12-AugHoles 8 4 7 3 22 12-AugDent 1 5 6 12-AugNot enough component 1 1 2 12-AugDeformed 1 1 12-AugTorn through handling 1 1 2 12-AugOil/grease stains 1 1 1 3 12-AugTotal Defects 12 6 12 6 6 12-Aug

12-AugDraw a c Chart of Total Defects Per Day 12-AugDraw a Pareto Chart of Types of Defects 12-Aug

13-Aug13-Aug13-Aug13-Aug13-Aug13-Aug14-Aug14-Aug14-Aug14-Aug14-Aug14-Aug14-Aug14-Aug14-Aug14-Aug14-Aug14-Aug15-Aug15-Aug15-Aug15-Aug15-Aug15-Aug16-Aug16-Aug16-Aug16-Aug16-Aug16-Aug

Page 12: SPC Simplified

Auto Seat Cushion DefectsPoor Mix Click on Auto Seat Cushion DefectsPoor Mix Draw a Pareto ChartHolesHoles Click on Date, then hold down Ctrl key and click Auto Seat Cushion DefectsHoles Use PivotTable Wizard to summarize dataHolesHolesHolesHolesHolesNot enough componentTorn through handlingHolesHolesHolesHolesDentOil/grease stainsPoor MixPoor MixPoor MixHolesHolesHolesHolesHolesHolesHolesNot enough componentOil/grease stainsPoor MixHolesHolesHolesTorn through handlingOil/grease stainsDentDentDentDentDentDeformed

Page 13: SPC Simplified

Click on Date, then hold down Ctrl key and click Auto Seat Cushion Defects

Page 14: SPC Simplified

Defects 1st shift 2nd shift 3rd shift Total 10.1% of hose assemblies are defectiveToo Short 30 35 26 91 Leadership thinks it's a shift issue.Too long 44 44 44 132 What issues should be addressed?Missing threads 10 69 70 149Leaks 330 321 347 998 Run Pareto Chart of Total DefectsDamaged 8 11 5 24 Run Pareto Chart of Defects by ShiftOther 22 20 13 55Total Defects 444 500 505

O.K. 4508 4495 4481 13484

Page 15: SPC Simplified

10.1% of hose assemblies are defective SPC Simplified, Quality Resources, 1989Leadership thinks it's a shift issue.What issues should be addressed?

Run Pareto Chart of Total DefectsRun Pareto Chart of Defects by Shift

Page 16: SPC Simplified

Minutes to process small business transactions (banking) Time at Drive Through Window84 5:4826 6:21 A Credit Union is worried they are losing business because of long wait times22 3:36 Run XmR Chart and Histogram of Minutes to Process10 6:03 Run Histogram of Time at Drive Through52 8:4754 6:0442 3:1776 2:2864 3:3632 1:3154 3:5172 6:2772 7:3070 6:4136 3:2562 4:4750 1:2044 3:5286 2:4260 5:0750 2:0358 3:4816 3:3936 4:3444 1:2356 1:0042 2:3620 2:4150 2:3756 2:0058 2:4574 0:2036 3:2970 0:5542 1:2960 2:2468 1:5346 2:2260 2:1748 2:3034 7:1956 3:2124 1:3772 3:2648 2:2858 1:0780 1:4058 1:3846 5:4734 0:48

1:553:361:56

Page 17: SPC Simplified

5:352:501:43

Page 18: SPC Simplified

A Credit Union is worried they are losing business because of long wait timesRun XmR Chart and Histogram of Minutes to ProcessRun Histogram of Time at Drive Through