Process limits
Calculate limits based on target process capability and historical data.
Summary
This calculator translates target Cp/Cpk values into specification limits using historical mean and sigma estimates.
Upload subgrouped data to estimate the mean, within sigma, and overall sigma. Use the target capability to generate limits around the mean or select a one-sided limit when only LSL or USL applies.
Two-sided limits assume symmetry around the mean. One-sided limits calculate only the chosen LSL or USL.
Process limits inputs
Use consistent units for mean and sigma. Upload raw data to estimate mean and sigma values automatically.
Target capability
Common benchmarks: Cp/Cpk >= 1.0 (baseline), >= 1.33 (typical minimum), >= 1.67 (critical), ~ 2.0 (Six Sigma target).
Calculated limits
Provide a target capability and sigma to calculate limits.
Regulatory references
Read-only guidance aligned with major regulatory bodies.