iSixSigma

Control Chart Wizard – u-Chart

Control Chart Suggestion

u-Chart

Control Chart Description

Control Chart Wizard – u-Chart: Control charts dealing with the number of defects or nonconformities over time are called u charts. There is a difference between a defect and defective, as there is between a nonconformity and nonconforming unit. The u-chart control chart is used with discrete/attribute defect data when the sample size varies.

Control Chart Formulae

U-chart Control Chart Formulae

Control Chart Example

U Chart Control Chart Example

Additional Resources

References

Wheeler, D.J., & Chambers, D.S. (1992). Understanding Statistical Process Control. Knoxville, TN: SPC Press.

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