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Six sigma quick references
Six sigma quick references
Six sigma quick references
Six sigma quick references
Six sigma quick references
Six sigma quick references
Six sigma quick references
Six sigma quick references
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Six sigma quick references

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  • 1. Six Sigma Quick References mail: info@vivocorp.in
  • 2. A Six Sigma Project Life Cycle mail: info@vivocorp.in
  • 3. Which Test / Tool to Choose (output) (input) mail: info@vivocorp.in
  • 4. Variable Gauge R&R acceptable criteria for Minitab OutputComponents of VariationGage R&R %ContributionSource VarComp (of VarComp) Criteria %Contribution % Tolerance % ProcessTotal Gage R&R 0.0044375 10.67 (of Var Comp) (SV/Toler) (SV/Proc) Repeatability 0.0012917 3.10 Marginally <9% <30% <30% Reproducibility 0.0031458 7.56 Operator 0.0009120 2.19 Acceptable Operator*Part 0.0022338 5.37 GoodPart-To-Part 0.0371644 89.33 <4% <20% <20%Total Variation 0.0416019 100.00 Excellent <1% <10% <10% Study Var %Study Var %Tolerance %ProcessSource StdDev (SD) (6 * SD) (%SV) (SV/Toler) (SV/Proc)Total Gage R&R 0.066615 0.39969 32.66 28.55 37.01 Repeatability 0.035940 0.21564 17.62 15.40 19.97 Reproducibility 0.056088 0.33653 27.50 24.04 31.16 Operator 0.030200 0.18120 14.81 12.94 16.78 Operator*Part 0.047263 0.28358 23.17 20.26 26.26Part-To-Part 0.192781 1.15668 94.52 82.62 107.10Total Variation 0.203965 1.22379 100.00 87.41 113.31Number of Distinct Categories = 4 In addition , Number of Distinct Categories >= 4 mail: info@vivocorp.in
  • 5. Sources of Variation in a Process Observed Process Variation Actual Process Measurement variation VariationLong Term Short Term Variation Variation due Variation due Process Process Within a to gauge to operator Variation Variation Sample Accuracy or Reproducibility Bias Repeatability Stability Linearity mail: info@vivocorp.in
  • 6. Box and Whisker Plots Min Q1 M Q3 Max smallest First, Second and Third Quartiles largest value (Second Quartile is the Median, M) value Inter Quartile Range (Q3-Q1) Q1-1.5 x (IQR) Q3+1.5 x (IQR)Boxplot * Smallest Data Value > Lower Fence Largest Data Value < Upper Fence Outlier (Min unless min is an outlier) (Max unless max is an outlier) mail: info@vivocorp.in
  • 7. Box and Whisker Plots 80 x x 70 x 60 x Extend the the working out Cumulative frequency 50 x lines below the x axis 40 x 30 Median UQ 20 x LQ x Maximum valueMinimum value 10 x x 0 0 10 20 30 40 50 60 70 80 90 100 Weight (g) Draw the box plot like this mail: info@vivocorp.in
  • 8. Available at :http://www.slideshare.net mail: info@vivocorp.in

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