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ATTRIBUTE
CHARTS
Attribute Charts are a set
of control charts specifically designed for Attributes
data. Attribute charts monitor the process location and variation over
time in a single chart.
The family of Attribute Charts
include the:
- Np-Chart: for
monitoring the number of times a condition occurs, relative to a constant
sample size, when each sample can either have this condition, or not
have this condition
- p-Chart: for
monitoring the percent of samples having the condition, relative to
either a fixed or varying sample size, when each sample can either have
this condition, or not have this condition
- c-Chart: for
monitoring the number of times a condition occurs, relative to a constant
sample size, when each sample can have more than one instance of the
condition.
- u-Chart: for
monitoring the percent of samples having the condition, relative to
either a fixed or varying sample size, when each sample can have more
than one instance of the condition.
See also:
SPC
Concepts
When
to Use an Attribute Chart
Interpreting
an Attribute Chart
P-Chart
Calculations
Np-Chart
Calculations
U-Chart
Calculations
C-Chart
Calculations
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