Types Of Quality Charts
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Types of charts Chart
Process observation
Process observations relationships
Process observations type
Size of shift to detect
XbarR chart
Quality characteristic measurement within one subgroup Independent
Variables
Large (≥ 1.5σ)
XbarS chart
Quality characteristic measurement within one subgroup Independent
Variables
Large (≥ 1.5σ)
Shewhart individuals control chart (ImR chart or XmR Quality characteristic measurement chart) for one observation Independent
Variables
Large (≥ 1.5σ)
Three-way chart
Quality characteristic measurement within one subgroup Independent
Variables
Large (≥ 1.5σ)
p-chart
Fraction nonconforming within one subgroup
Independent
Attributes
Large (≥ 1.5σ)
np-chart
Number nonconforming within one subgroup
Independent
Attributes
Large (≥ 1.5σ)
c-chart
Number of nonconformances within one subgroup Independent
Attributes
Large (≥ 1.5σ)
u-chart
Nonconformances per unit within one subgroup
Independent
Attributes
Large (≥ 1.5σ)
EWMA chart
Exponentially weighted moving average of quality characteristic measurement within one subgroup
Independent
Attributes or variables
Small (< 1.5σ)
CUSUM chart
Cumulative sum of quality characteristic measurement within one subgroup
Independent
Attributes or variables
Small (< 1.5σ)
Time series model
Quality characteristic measurement within one subgroup Autocorrelated
Attributes or variables
N/A
Process observation
Process observations relationships
Process observations type
Size of shift to detect
XbarR chart
Quality characteristic measurement within one subgroup Independent
Variables
Large (≥ 1.5σ)
XbarS chart
Quality characteristic measurement within one subgroup Independent
Variables
Large (≥ 1.5σ)
Shewhart individuals control chart (ImR chart or XmR Quality characteristic measurement chart) for one observation Independent
Variables
Large (≥ 1.5σ)
Three-way chart
Quality characteristic measurement within one subgroup Independent
Variables
Large (≥ 1.5σ)
p-chart
Fraction nonconforming within one subgroup
Independent
Attributes
Large (≥ 1.5σ)
np-chart
Number nonconforming within one subgroup
Independent
Attributes
Large (≥ 1.5σ)
c-chart
Number of nonconformances within one subgroup Independent
Attributes
Large (≥ 1.5σ)
u-chart
Nonconformances per unit within one subgroup
Independent
Attributes
Large (≥ 1.5σ)
EWMA chart
Exponentially weighted moving average of quality characteristic measurement within one subgroup
Independent
Attributes or variables
Small (< 1.5σ)
CUSUM chart
Cumulative sum of quality characteristic measurement within one subgroup
Independent
Attributes or variables
Small (< 1.5σ)
Time series model
Quality characteristic measurement within one subgroup Autocorrelated
Attributes or variables
N/A
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