py-qcc

Quality Control Charts in Python. Inspired by the R qcc package.

Planned features

Tools:

• Reshape data table with value column and subgroup reference column (qcc_groups).

Charts for continuous variables:

• x-bar for subgroup means.
• R for subgroup ranges.
• s for subgroup variance.
• Individuals for single measurements.
• Moving range for single measurements.

Charts for attributes:

• p for proportion of nonconforming units.
• np for number of nonconforming units.
• c for nonconformities per unit.
• u for average nonconformities per unit.

Other charts:

• Operating characteristic.
• Process capability.
• Cusum.
• EWMA.
• Pareto.
• Multivariate control charts.

Additional features:

• Calibration data and subsequent new data.
• Nelson and Western Electric rules.
• Summary statistics.