Control+chart+roadmap
1
Start Variable or Attribute? Defects or Defectives? Constant sample size (n)? Constant area of opportunity? c-chart u-chart p-chart np-chart Xbar -S chart IMR chart Xbar-R chart Is n fixed and n<10? Attribute Variable No Yes 2<=n<=9 n=1 Defects Defectives Yes No Yes No Control Chart Roadmap n = sample size or subgroup size # Defective Units (DU) Proportion of DU # Mistake/100 Unit # Mistakes/Unit
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Transcript of Control+chart+roadmap
Start
Variable orAttribute?
Defects orDefectives?
Constant sample size (n)?
Constant area of
opportunity?
c-chart u-chartp-chartnp-chart
Xbar -S chart
IMR chart Xbar-R chart
Is n fixedand n<10?
AttributeVariableNo
Yes
2<=n<=9n=1DefectsDefectives
Yes No
Yes No
Control Chart Roadmap
n = sample size orsubgroup size
# Defective Units (DU) Proportion of DU # Mistake/100 Unit # Mistakes/Unit