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Advanced Control Charts - Coggle Diagram
Advanced Control Charts
X-bar & R Chart
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Data can be grouped into subgroups, letting you chart the mean of each group
Data count in each subgroup is less than 8 (although you can use the x-bar & R chart for subgroup sizes up to 100 in Minitab)
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X-bar & S Chart
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Data can be grouped into subgroups, letting you chart the mean of each group
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Sigma can be easily calculated (otherwise, use x-bar & R)
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I & MR Chart
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Data cannot be easily into reasonable subgroups, so you must track individual data points instead of subgroup means
P-chart
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Plots the proportion of units that are nonconforming (are defective, don't meet specifications)
U-Chart
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Use when data is about the defects themselves, not the overall defective product
C-Chart
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Use when data is about the defects themselves, not overall defective product