c Chart Formulas
QI Macros Can Calculate Them For You!
Draw a c Chart using QI Macros
- Select your data.
- Select c chart on QI Macros menu.
- QI Macros will do the math and draw the graph for you.
Go Deeper:
c Charts determine the stability of "counted" data when the opportunity is large compared to the actual number of defects ( e.g. injuries per month or falls per month).
Here is the formula used to calculate a c Chart.
cᵢ = number of nonconformities found
Conforms with ANSI/ASQC B1, B2, B3 1996
NOTE: It is not possible to have negative limits on a c Chart. With that, any calculated value that is below 0 is automatically changed to 0.
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Learn More...
- Create a c Chart in Excel using QI Macros
- c Chart Video
- Other Control Chart Formulas
The c chart is just one of the tools included in QI Macros SPC Software for Excel.
Why Choose QI Macros Over Other Control Chart Software?
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- Works right in Excel
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